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GOODWILL (Details) - USD ($)	3 Months Ended
GOODWILL (Details) - USD ($)	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Goodwill [Line Items]
Goodwill	$ 3,006,000		$ 3,006,000
Goodwill impairment loss	$ 0	$ 0

- Definition

Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

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+ Details

- Definition

Amount of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References + Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

SIGNIFICANT ACCOUNTING POLICIES

3 Months Ended

Mar. 31, 2026

Accounting Policies [Abstract]

SIGNIFICANT ACCOUNTING POLICIES

Basis of Presentation and Principle of Consolidation

The accompanying unaudited consolidated financial statements include the accounts of Telos and its subsidiaries (see Note 1 – Organization), all of whose issued and outstanding share capital is wholly owned directly and indirectly by Telos Corporation. All intercompany transactions have been eliminated in consolidation.

The unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"), and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC").

Basis of Presentation for Interim Periods

Certain information and footnote disclosures normally included for the annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted for the interim periods presented. We believe that the unaudited interim financial statements include all adjustments (which are normal and recurring) necessary to state fairly our financial position and the results of operations and cash flows for the periods presented.

The results of operations for the interim periods presented are not necessarily indicative of results that may be expected for the year or future periods. The financial statements should be read in conjunction with our audited consolidated financial statements and the notes thereto for the year ended December 31, 2025, included in our Annual Report on Form 10-K for the fiscal year then ended. We have continued to follow the accounting policies set forth in those financial statements.

Use of Estimates

The preparation of these unaudited consolidated financial statements, in conformity with U.S. GAAP, requires management to make estimates and assumptions that affect the reported amounts of revenue, expenses, assets and liabilities, and disclosure of contingent assets and liabilities. The Company regularly assesses these estimates; however, actual results could differ from those estimates. We base our estimates on historical experience, currently available information, and various other assumptions that we believe are reasonable under the circumstances.

Management evaluates these estimates and assumptions on an ongoing basis, including those relating to revenue recognition on cost estimation on certain contracts, allowance for credit losses, inventory obsolescence, valuation allowance for deferred tax assets, income taxes, certain assumptions related to share-based compensation, valuation of intangible assets and goodwill, restructuring expenses accruals, and contingencies. Actual results could differ from those estimates. The impact of changes in estimates is recorded in the period in which they become known.

Restructuring Expenses

As disclosed in the Company's recent Annual Report on Form 10-K for the year ended December 31, 2025, in the fourth quarter of 2025, the Company committed to a restructuring plan as part of its efforts to streamline operations and to align people, roles and projects to our strategic priorities ("2025 restructuring"). The 2025 restructuring plan reduced the Company's workforce, with a portion of the affected employees separating from the business during the current quarter and the remainder expected to separate by the third quarter of 2026. The Company continues to evaluate the 2025 restructuring plan and may incur incremental restructuring charges through the remainder of 2026 to the extent such charges are determined to be probable and estimable. The Company incurred $1.5 million in cumulative restructuring expenses related to the 2025 restructuring plan.

At each reporting date, the Company evaluates its restructuring expense accrual to determine if the liabilities reported are still appropriate. Any changes in the estimated costs of executing the approved restructuring plan are reflected in the Company's unaudited consolidated statement of operations.


Table 2: Summary of Changes in Restructuring Expenses Accrual
	Severance and related benefit costs(1)

	(in thousands)
Balance at December 31, 2025	$	1,451
Cash payments	(380)
Balance at March 31, 2026	$	1,071

(1) Restructuring-related liabilities are reported as part of "Accrued liabilities" in the Company's unaudited consolidated balance sheets, see Note 8 - Other Balance Sheet Components for further details.

Recent Accounting Pronouncements

The Company adopted all applicable standards effective as of December 31, 2025, within these unaudited consolidated financial statements, with no material impact as a result of the adoption.

In November 2024, the FASB issued ASU 2024-03, "Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Topic 220): Disaggregation of Income Statement Expenses." This standard requires additional disclosure of certain amounts included in the expense captions presented on the statement of operations, as well as disclosures about selling expenses. The ASU is effective on a prospective basis, with the option for retrospective application. All public business entities are required to adopt the guidance in annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, with early adoption permitted. We are in the process of assessing the impact of the adoption of this ASU on our unaudited consolidated financial statements.

In July 2025, the FASB issued ASU 2025-05, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivables and Contract Assets.” This standard provides simplified guidance on measuring credit losses for accounts receivable and contract assets. The update introduces a practical expedient and an accounting policy election to ease the process. All entities can elect the practical expedient to assume that the current economic conditions at the balance sheet date will remain constant through the life of the current receivables and contract assets. Entities that elect the practical expedient and the accounting policy election should apply the amendments in this ASU prospectively. The ASU was effective for annual reporting periods beginning after December 15, 2025, and interim reporting periods within those annual reporting periods, with early adoption permitted. We adopted the standard in the first quarter of 2026 and the adoption did not have a material impact on our unaudited consolidated financial statements.

In September 2025, the FASB issued ASU 2025-06, "Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting of Internal-Use Software." This standard provides a simplified, consistent way to track expenses related to software developed for internal use. The amendments in this standard removed all references to project stages; instead, a company can capitalize software costs once both conditions are met: the entity's management has authorized and committed to funding the project, and it is probable that the project will be completed and the software will be used as intended. The amendments will be effective for annual reporting periods, including interim periods within those years, beginning after December 15, 2027, with early adoption permitted. We are currently assessing the impact of adopting this ASU on our unaudited consolidated financial statements.

In December 2025, the FASB issued ASU 2025-11, "Interim Reporting (Topic 270): Narrow-Scope Improvements," which was intended to improve the navigability of the guidance in ASC 270 and clarify when it applies. Public entities are required to adopt the guidance for interim reporting periods within annual reporting period beginning after December 15, 2027, with early adoption permitted. We are currently assessing the impact of adopting this ASU on our unaudited consolidated financial statements.

In December 2025, the FASB issued ASU 2025-12, "Codification Improvement." This ASU includes a number of improvements that span a wide range of topics, which includes amendments on the following provisions, among other things, (1) clarify diluted earnings per share ("EPS") calculation when a loss from continuing operation exists; (2) revising the calculation of the reference amount for beneficial interests to prevent double counting credit losses; (3) clarify the permissible methods to account for treasury stock retirements; and (4) clarify the guidance for transfers of receivables from contracts with customers. The standard will be effective for annual reporting periods beginning after December 31, 2026, and interim reporting periods within those annual reporting periods, with early adoption permitted. We are currently assessing the impact of adopting this ASU on our unaudited consolidated financial statements.

In addition, from time to time, new accounting standards are issued by the Financial Accounting Standards Board or other standard-setting bodies and are adopted by the Company as of the specified accounting date. Unless otherwise discussed, the Company believes that issued standards not yet effective will not have a material effect on its financial statements.

ORGANIZATION	3 Months Ended
ORGANIZATION	Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	ORGANIZATIONTelos Corporation, together with its subsidiaries (collectively, the "Company," "we," "our" or "Telos"), a Maryland corporation, is a leading provider of cyber, cloud and enterprise security solutions for the world's most security-conscious organizations. We own all of the issued and outstanding shares of Xacta Corporation and ubIQuity.com, inc. (a holding company for Xacta Corporation), and Teloworks, Inc. ("Teloworks"), and 100% ownership interest in Telos Identity Management Solutions, LLC ("Telos ID").

SEGMENT INFORMATION - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Revenues [Abstract]
Revenues	$ 47,742	$ 30,616
Cost of sales
Depreciation and amortization	2,596	1,503
Stock-based compensation expense	216	190
Other segment items	27,555	16,741
Total cost of sales	30,367	18,434
Gross profit	17,375	12,182
Operating expenses:
Research and development expenses	1,357	1,571
Selling, general and administrative expenses	14,563	19,633
Total operating expenses	15,920	21,204
Operating income (loss)	1,455	(9,022)
Other income	697	561
Interest expense	(111)	(147)
Income (loss) before income taxes	2,041	(8,608)
(Provision for) benefit from income taxes	(18)	4
Net income (loss)	2,023	(8,604)
Security Solutions
Revenues [Abstract]
Revenues	45,970	25,818
Cost of sales
Depreciation and amortization	2,593	1,501
Stock-based compensation expense	194	169
Other segment items	26,320	13,088
Total cost of sales	29,107	14,758
Gross profit	16,863	11,060
Secure Networks
Revenues [Abstract]
Revenues	1,772	4,798
Cost of sales
Depreciation and amortization	3	2
Stock-based compensation expense	22	21
Other segment items	1,235	3,653
Total cost of sales	1,260	3,676
Gross profit	$ 512	$ 1,122

INTANGIBLE ASSETS, NET - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 47,583	$ 47,081
Accumulated Amortization	(28,225)	(25,620)
Net Carrying Value	19,358	21,461
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Gross Carrying Amount	58,033	55,901
Accumulated Amortization	(28,225)	(25,620)
Net Carrying Value	29,808	30,281
In-Process Software Development Costs
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 10,450	8,820
Acquired technology
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	8 years
Gross Carrying Amount	$ 3,630	3,630
Accumulated Amortization	(2,117)	(2,004)
Net Carrying Value	1,513	1,626
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (2,117)	(2,004)
Customer relationship
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	3 years
Gross Carrying Amount	$ 40	40
Accumulated Amortization	(40)	(40)
Net Carrying Value	0	0
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	(40)	(40)
Software development costs
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,913	43,411
Accumulated Amortization	(26,068)	(23,576)
Net Carrying Value	17,845	19,835
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Accumulated Amortization	$ (26,068)	$ (23,576)
Software development costs \| Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	2 years
Software development costs \| Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated Useful Life	5 years

INTANGIBLE ASSETS, NET

3 Months Ended

Mar. 31, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

INTANGIBLE ASSETS, NET


Table 7.1: Details of Intangible Assets, Net
		March 31, 2026						December 31, 2025
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Value		Gross Carrying Amount		Accumulated Amortization		Net Carrying Value

	(in years)	(in thousands)
Acquired technology	8	$	3,630	$	(2,117)	$	1,513	$	3,630	$	(2,004)	$	1,626
Customer relationship	3	40		(40)		—		40		(40)		—
Software development costs	2 - 5	43,913		(26,068)		17,845		43,411		(23,576)		19,835
Subtotal		47,583		(28,225)		19,358		47,081		(25,620)		21,461
In-process software development costs (1)		10,450		—		10,450		8,820		—		8,820
Total		$	58,033	$	(28,225)	$	29,808	$	55,901	$	(25,620)	$	30,281


(1) In-process software development costs are costs for software that is not yet available for its intended use or general release to customers as of the balance sheet date, thus not yet amortized.


Table 7.2: Amortization Expense
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands)
Amortization expense related to:
Software development costs - cost of sales (1)	$	2,492	$	1,411
Other intangible assets - general and administrative	113		113
Total	$	2,605	$	1,524

(1) Amortization expense for software development costs related to assets to be sold, leased, or otherwise marketed is charged under cost of sales on the unaudited consolidated statements of operations.

SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
SIGNIFICANT ACCOUNTING POLICIES (Policies)	Mar. 31, 2026
Accounting Policies [Abstract]
Basis of Presentation and Principle of Consolidation	Basis of Presentation and Principle of Consolidation The accompanying unaudited consolidated financial statements include the accounts of Telos and its subsidiaries (see Note 1 – Organization), all of whose issued and outstanding share capital is wholly owned directly and indirectly by Telos Corporation. All intercompany transactions have been eliminated in consolidation. The unaudited consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"), and the rules and regulations of the U.S. Securities and Exchange Commission ("SEC").
Use of Estimates	Use of Estimates The preparation of these unaudited consolidated financial statements, in conformity with U.S. GAAP, requires management to make estimates and assumptions that affect the reported amounts of revenue, expenses, assets and liabilities, and disclosure of contingent assets and liabilities. The Company regularly assesses these estimates; however, actual results could differ from those estimates. We base our estimates on historical experience, currently available information, and various other assumptions that we believe are reasonable under the circumstances. Management evaluates these estimates and assumptions on an ongoing basis, including those relating to revenue recognition on cost estimation on certain contracts, allowance for credit losses, inventory obsolescence, valuation allowance for deferred tax assets, income taxes, certain assumptions related to share-based compensation, valuation of intangible assets and goodwill, restructuring expenses accruals, and contingencies. Actual results could differ from those estimates. The impact of changes in estimates is recorded in the period in which they become known.
Restructuring Expenses	Restructuring Expenses As disclosed in the Company's recent Annual Report on Form 10-K for the year ended December 31, 2025, in the fourth quarter of 2025, the Company committed to a restructuring plan as part of its efforts to streamline operations and to align people, roles and projects to our strategic priorities ("2025 restructuring"). The 2025 restructuring plan reduced the Company's workforce, with a portion of the affected employees separating from the business during the current quarter and the remainder expected to separate by the third quarter of 2026. The Company continues to evaluate the 2025 restructuring plan and may incur incremental restructuring charges through the remainder of 2026 to the extent such charges are determined to be probable and estimable. The Company incurred $1.5 million in cumulative restructuring expenses related to the 2025 restructuring plan. At each reporting date, the Company evaluates its restructuring expense accrual to determine if the liabilities reported are still appropriate. Any changes in the estimated costs of executing the approved restructuring plan are reflected in the Company's unaudited consolidated statement of operations.
Recent Accounting Pronouncements	Recent Accounting Pronouncements The Company adopted all applicable standards effective as of December 31, 2025, within these unaudited consolidated financial statements, with no material impact as a result of the adoption. In November 2024, the FASB issued ASU 2024-03, "Income Statement – Reporting Comprehensive Income – Expense Disaggregation Disclosures (Topic 220): Disaggregation of Income Statement Expenses." This standard requires additional disclosure of certain amounts included in the expense captions presented on the statement of operations, as well as disclosures about selling expenses. The ASU is effective on a prospective basis, with the option for retrospective application. All public business entities are required to adopt the guidance in annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, with early adoption permitted. We are in the process of assessing the impact of the adoption of this ASU on our unaudited consolidated financial statements. In July 2025, the FASB issued ASU 2025-05, “Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivables and Contract Assets.” This standard provides simplified guidance on measuring credit losses for accounts receivable and contract assets. The update introduces a practical expedient and an accounting policy election to ease the process. All entities can elect the practical expedient to assume that the current economic conditions at the balance sheet date will remain constant through the life of the current receivables and contract assets. Entities that elect the practical expedient and the accounting policy election should apply the amendments in this ASU prospectively. The ASU was effective for annual reporting periods beginning after December 15, 2025, and interim reporting periods within those annual reporting periods, with early adoption permitted. We adopted the standard in the first quarter of 2026 and the adoption did not have a material impact on our unaudited consolidated financial statements. In September 2025, the FASB issued ASU 2025-06, "Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting of Internal-Use Software." This standard provides a simplified, consistent way to track expenses related to software developed for internal use. The amendments in this standard removed all references to project stages; instead, a company can capitalize software costs once both conditions are met: the entity's management has authorized and committed to funding the project, and it is probable that the project will be completed and the software will be used as intended. The amendments will be effective for annual reporting periods, including interim periods within those years, beginning after December 15, 2027, with early adoption permitted. We are currently assessing the impact of adopting this ASU on our unaudited consolidated financial statements. In December 2025, the FASB issued ASU 2025-11, "Interim Reporting (Topic 270): Narrow-Scope Improvements," which was intended to improve the navigability of the guidance in ASC 270 and clarify when it applies. Public entities are required to adopt the guidance for interim reporting periods within annual reporting period beginning after December 15, 2027, with early adoption permitted. We are currently assessing the impact of adopting this ASU on our unaudited consolidated financial statements. In December 2025, the FASB issued ASU 2025-12, "Codification Improvement." This ASU includes a number of improvements that span a wide range of topics, which includes amendments on the following provisions, among other things, (1) clarify diluted earnings per share ("EPS") calculation when a loss from continuing operation exists; (2) revising the calculation of the reference amount for beneficial interests to prevent double counting credit losses; (3) clarify the permissible methods to account for treasury stock retirements; and (4) clarify the guidance for transfers of receivables from contracts with customers. The standard will be effective for annual reporting periods beginning after December 31, 2026, and interim reporting periods within those annual reporting periods, with early adoption permitted. We are currently assessing the impact of adopting this ASU on our unaudited consolidated financial statements. In addition, from time to time, new accounting standards are issued by the Financial Accounting Standards Board or other standard-setting bodies and are adopted by the Company as of the specified accounting date. Unless otherwise discussed, the Company believes that issued standards not yet effective will not have a material effect on its financial statements.
Revenue Recognition	The majority of our revenue is recognized over time, as control is transferred continuously to our customers, who receive and consume benefits as we perform. Revenue transferred to customers over time accounted for 71% and 79% of our revenue for the three months ended March 31, 2026, and 2025, respectively. For performance obligations in which control does not continuously transfer to the customer, we recognize revenue when each performance obligation is fully satisfied. This coincides with the point in time the customer obtains control of the product or service, which typically occurs upon customer acceptance or receipt of the product or service, given that we maintain control of the product or service until that point. Revenue transferred to customers at a point in time accounted for 29% and 21% of our revenue for the three months ended March 31, 2026, and 2025, respectively. The change in revenue mix for the three months ended March 31, 2026, as compared to the prior period, was primarily driven by an increase in product sales volume from a successful ramp-up of a significant program. Our contracts may include various types of variable considerations and may include estimated amounts in the transaction price, based on all of the information available to us, and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when any uncertainty associated with the variable consideration is resolved. We evaluate and include these estimated amounts of variable consideration in the transaction price and as performance on these contracts is complete, we adjust our revenue when deemed necessary. No revenue adjustments were recorded during the three months ended March 31, 2026, and 2025. We provide for anticipated losses on contracts during the period when the loss is determined by recording an expense for the total expected costs that exceed the total estimated revenue for a performance obligation. No contract loss was recorded during the three months ended March 31, 2026. We recorded an immaterial contract loss during the three months ended March 31, 2025.

- Definition

Disclosure of accounting policy for revenue from contract with customer.

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- Definition

Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

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+ Details

INTANGIBLE ASSETS, NET (Tables)

3 Months Ended

Mar. 31, 2026

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets, Net


Table 7.1: Details of Intangible Assets, Net
		March 31, 2026						December 31, 2025
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Value		Gross Carrying Amount		Accumulated Amortization		Net Carrying Value

	(in years)	(in thousands)
Acquired technology	8	$	3,630	$	(2,117)	$	1,513	$	3,630	$	(2,004)	$	1,626
Customer relationship	3	40		(40)		—		40		(40)		—
Software development costs	2 - 5	43,913		(26,068)		17,845		43,411		(23,576)		19,835
Subtotal		47,583		(28,225)		19,358		47,081		(25,620)		21,461
In-process software development costs (1)		10,450		—		10,450		8,820		—		8,820
Total		$	58,033	$	(28,225)	$	29,808	$	55,901	$	(25,620)	$	30,281


(1) In-process software development costs are costs for software that is not yet available for its intended use or general release to customers as of the balance sheet date, thus not yet amortized.

Schedule of Indefinite-Lived Intangible Assets


Table 7.1: Details of Intangible Assets, Net
		March 31, 2026						December 31, 2025
	Estimated Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Value		Gross Carrying Amount		Accumulated Amortization		Net Carrying Value

	(in years)	(in thousands)
Acquired technology	8	$	3,630	$	(2,117)	$	1,513	$	3,630	$	(2,004)	$	1,626
Customer relationship	3	40		(40)		—		40		(40)		—
Software development costs	2 - 5	43,913		(26,068)		17,845		43,411		(23,576)		19,835
Subtotal		47,583		(28,225)		19,358		47,081		(25,620)		21,461
In-process software development costs (1)		10,450		—		10,450		8,820		—		8,820
Total		$	58,033	$	(28,225)	$	29,808	$	55,901	$	(25,620)	$	30,281


(1) In-process software development costs are costs for software that is not yet available for its intended use or general release to customers as of the balance sheet date, thus not yet amortized.

Schedule of Amortization Expense


Table 7.2: Amortization Expense
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands)
Amortization expense related to:
Software development costs - cost of sales (1)	$	2,492	$	1,411
Other intangible assets - general and administrative	113		113
Total	$	2,605	$	1,524

REVENUE RECOGNITION - Schedule of Contract with Customer, Contract Asset, Contract Liability, and Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Revenue from Contract with Customer [Abstract]
Billed accounts receivables	$ 9,968	$ 9,375
Unbilled accounts receivable	6,003	6,962
Contract assets	454	663
Contract liabilities – current	18,096	11,223
Contract liabilities – non-current	$ 951	$ 1,124

EARNINGS (LOSS) PER SHARE (Tables)

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares


Table 13: Weighted-Average Number of Shares Outstanding – Earnings per Share
	For the Three Months Ended
	March 31, 2026	March 31, 2025

	(in thousands)
Basic weighted-average number of shares outstanding	73,822	72,715
Dilutive effect of unvested restricted stock units and stock options	3,793	—
Diluted weighted-average number of shares outstanding	77,615	72,715

SIGNIFICANT ACCOUNTING POLICIES - Changes in Restructuring Expenses Accrual (Details) - Severance and related benefit costs $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 1,451
Cash payments	(380)
Ending Balance	$ 1,071

SUPPLEMENTAL CASH FLOW INFORMATION (Tables)

3 Months Ended

Mar. 31, 2026

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash and Cash Equivalents


Table 15.1: Details of Cash, Cash Equivalents, and Restricted Cash
	March 31, 2026		December 31, 2025

	(in thousands)
Cash and cash equivalents	$	50,230	$	53,180
Restricted cash (1)	140		140
Cash, cash equivalents, and restricted cash	$	50,370	$	53,320

(1) Restricted cash consists of a commercial money market account held as a deposit on the Ashburn lease and is included within "Other assets" on the unaudited consolidated balance sheets.

Schedule of Restrictions on Cash and Cash Equivalents


Table 15.1: Details of Cash, Cash Equivalents, and Restricted Cash
	March 31, 2026		December 31, 2025

	(in thousands)
Cash and cash equivalents	$	50,230	$	53,180
Restricted cash (1)	140		140
Cash, cash equivalents, and restricted cash	$	50,370	$	53,320

(1) Restricted cash consists of a commercial money market account held as a deposit on the Ashburn lease and is included within "Other assets" on the unaudited consolidated balance sheets.

Schedule of Supplemental Cash Flow Information


Table 15.2: Supplemental Cash Flow Information
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands)
Cash paid during the period for:
Interest	$	109	$	129
Non-cash investing and financing activities:
Capital expenditure activity in accounts payable and other accrued liabilities	$	54	$	288
Issuance of common stock for 401K match	1,659		2,063
Issuance of common stock for AIP payment	3,987		—

SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment


Table 14: Results of Operations by Business Segment
	For the Three Months Ended
	March 31, 2026						March 31, 2025
	Security Solutions		Secure Networks		Total		Security Solutions		Secure Networks		Total

	(in thousands)
Revenues	$	45,970	$	1,772	$	47,742	$	25,818	$	4,798	$	30,616
Cost of sales
Depreciation and amortization (1)	2,593		3		2,596		1,501		2		1,503
Stock-based compensation expense (1)	194		22		216		169		21		190
Other segment items (2)	26,320		1,235		27,555		13,088		3,653		16,741
Total cost of sales	29,107		1,260		30,367		14,758		3,676		18,434
Gross profit	$	16,863	$	512	17,375		$	11,060	$	1,122	12,182
Operating expenses:
Research and development expenses					1,357						1,571
Selling, general and administrative expenses					14,563						19,633
Total operating expenses					15,920						21,204
Operating income (loss)					1,455						(9,022)
Other income					697						561
Interest expense					(111)						(147)
Income (loss) before income taxes					2,041						(8,608)
(Provision for) benefit from income taxes					(18)						4
Net income (loss)					$	2,023					$	(8,604)

(1) The significant segment expense categories and amounts align with the segment-level information regularly provided by the CODM.

(2) Other segment items for each reportable segment include direct labor, direct subcontractor costs, direct materials and inventory, other direct non-labor costs, fringes, overhead, and facility costs.

REVENUE RECOGNITION

3 Months Ended

Mar. 31, 2026

Revenue from Contract with Customer [Abstract]

REVENUE RECOGNITION

The majority of our revenue is recognized over time, as control is transferred continuously to our customers, who receive and consume benefits as we perform. Revenue transferred to customers over time accounted for 71% and 79% of our revenue for the three months ended March 31, 2026, and 2025, respectively. For performance obligations in which control does not continuously transfer to the customer, we recognize revenue when each performance obligation is fully satisfied. This coincides with the point in time the customer obtains control of the product or service, which typically occurs upon customer acceptance or receipt of the product or service, given that we maintain control of the product or service until that point. Revenue transferred to customers at a point in time accounted for 29% and 21% of our revenue for the three months ended March 31, 2026, and 2025, respectively. The change in revenue mix for the three months ended March 31, 2026, as compared to the prior period, was primarily driven by an increase in product sales volume from a successful ramp-up of a significant program.

Our contracts may include various types of variable considerations and may include estimated amounts in the transaction price, based on all of the information available to us, and to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur when any uncertainty associated with the variable consideration is resolved. We evaluate and include these estimated amounts of variable consideration in the transaction price and as performance on these contracts is complete, we adjust our revenue when deemed necessary. No revenue adjustments were recorded during the three months ended March 31, 2026, and 2025.

We provide for anticipated losses on contracts during the period when the loss is determined by recording an expense for the total expected costs that exceed the total estimated revenue for a performance obligation. No contract loss was recorded during the three months ended March 31, 2026. We recorded an immaterial contract loss during the three months ended March 31, 2025.

Disaggregated Revenues

In addition to our segment reporting, as further discussed in Note 1 4 – Segment Information, we disaggregate our revenues by customer and contract types. We treat sales to U.S. customers as sales within the U.S. regardless of where the services are performed. Substantially most of our revenues are generated from U.S. customers, while international customers are de minimis; as such, the financial information by geographic location is not presented.


Table 3.1: Revenue by Customer Type
	For the Three Months Ended
	March 31, 2026			March 31, 2025
	Amount		%	Amount		%

	(dollars in thousands)
Federal	$	44,204	93 %	$	27,301	89 %
State & local, and commercial	3,538		7 %	3,315		11 %
Total revenue	$	47,742	100 %	$	30,616	100 %


Table 3.2: Revenue by Contract Type
	For the Three Months Ended
	March 31, 2026			March 31, 2025
	Amount		%	Amount		%

	(dollars in thousands)
Firm fixed-price	$	37,461	79 %	$	19,998	65 %
Time-and-materials	8,662		18 %	8,377		28 %
Cost plus fixed fee	1,619		3 %	2,241		7 %
Total revenue	$	47,742	100 %	$	30,616	100 %

A majority of the Company's revenue was derived under prime contracts and subcontracts with agencies and departments of the U.S. federal government. No other customer accounted for 10% or more of the Company's revenue during the three months ended March 31, 2026, and 2025.


Table 3.3: Revenue Concentration Greater than 10% of Total Revenue
	For the Three Months Ended
	March 31, 2026		March 31, 2025
Federal government:
Security Solutions segment	$	42,432	$	22,652
Secure Networks segment	1,772		4,649
Total	$	44,204	$	27,301


Table 3.4: Contract Balances
	Balance Sheet Presentation	March 31, 2026		December 31, 2025

		(in thousands)
Billed accounts receivables (1)	Accounts receivable, net	$	9,968	$	9,375
Unbilled accounts receivable	Accounts receivable, net	6,003		6,962
Contract assets	Accounts receivable, net	454		663
Contract liabilities – current	Contract liabilities – current portion	18,096		11,223
Contract liabilities – non-current	Contract liabilities – non-current portion	951		1,124

(1) Net of allowance for credit losses.

The changes in the Company's contract assets and contract liabilities during the current period were primarily the result of the timing differences between the Company's performance, invoicing and customer payments. Revenue recognized for the three months ended March 31, 2026, and 2025, which was included in the contract liabilities balance at December 31, 2025, and 2024, was $4.8 million and $2.4 million, respectively.

As of March 31, 2026, we had approximately $61.9 million of remaining performance obligations, which we also refer to as funded backlog. We expect to recognize approximately 98% of our remaining performance obligations over the next 12 months, and the balance thereafter.

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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+ Details

STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement [Abstract]

Schedule of Stock Compensation Expense

There were no income tax benefits recognized on the share-based compensation expense (as reflected on the table below) for the three months ended March 31, 2026, and 2025.


Table 10.1: Details of Stock Compensation Expense by Statements of Operations Line Item
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands)
Cost of sales – services	$	216	$	190
Research and development	219		40
Selling, general and administrative	2,536		6,818
Total	$	2,971	$	7,048

Schedule of Restricted Stock Unit Activity


Table 10.2: Restricted Stock Activity
	Service-Based	Performance-Based	Total Shares	Weighted-Average Grant Date Fair Value
Unvested outstanding units as of December 31, 2025	2,182,836	10,861,854	13,044,690	$	3.49
Granted	991,756	—	991,756	4.02
Vested	(991,756)	(2,420,691)	(3,412,447)	3.42
Forfeited	(27,255)	—	(27,255)	3.70
Unvested outstanding units as of March 31, 2026	2,155,581	8,441,163	10,596,744	$	3.27

Schedule of Stock Option Activity


Table 10.3: Stock Option Activity
	Stock Options Outstanding	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding option balance as of December 31, 2025	227,000	$	1.80	7.4	$	749,100
Granted	—	—		0.0	—
Exercised	—	—		0.0	—
Forfeited, cancelled, or expired	—	—		0.0	—
Outstanding option balance as of March 31, 2026	227,000	$	1.80	7.1	$	542,530
Exercisable stock option as of March 31, 2026	227,000	$	1.80	7.1	$	542,530

REVENUE RECOGNITION - Narrative (Details) - USD ($)	3 Months Ended
REVENUE RECOGNITION - Narrative (Details) - USD ($)	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Contract with customer, asset, cumulative catch-up adjustment to revenue, modification of contract	$ 0	$ 0
Contract with customer, liability, revenue recognized	4,800,000	$ 2,400,000
Remaining performance obligations	$ 61,900,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-04-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation (as a percent)	98.00%
Remaining performance obligation, period	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-04-01
Disaggregation of Revenue [Line Items]
Remaining performance obligation, period
Revenue from Contract with Customer, Product and Service Benchmark \| Revenue Timing of Transfer of Goods or Service \| Transferred over Time
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	71.00%	79.00%
Revenue from Contract with Customer, Product and Service Benchmark \| Revenue Timing of Transfer of Goods or Service \| Transferred at Point in Time
Disaggregation of Revenue [Line Items]
Concentration risk, percentage	29.00%	21.00%

PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Property, Plant and Equipment [Line Items]
Gross Carrying Amount	$ 20,734		$ 20,694
Accumulated Depreciation and Amortization	(18,040)		(17,623)
Net Carrying Value	2,694		3,071
Depreciation and amortization expense	457	$ 445
Furniture and equipment
Property, Plant and Equipment [Line Items]
Gross Carrying Amount	17,315		17,275
Accumulated Depreciation and Amortization	(15,104)		(14,727)
Net Carrying Value	2,211		2,548
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross Carrying Amount	3,419		3,419
Accumulated Depreciation and Amortization	(2,936)		(2,896)
Net Carrying Value	$ 483		$ 523

PROPERTY AND EQUIPMENT, NET (Tables)

3 Months Ended

Mar. 31, 2026

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment, Net including Depreciation and Amortization Expense


Table 5.1: Details of Property and Equipment, Net
	March 31, 2026						December 31, 2025
	Gross Carrying Amount		Accumulated Depreciation and Amortization		Net Carrying Value		Gross Carrying Amount		Accumulated Depreciation and Amortization		Net Carrying Value

	(in thousands)
Furniture and equipment	$	17,315	$	(15,104)	$	2,211	$	17,275	$	(14,727)	$	2,548
Leasehold improvements	3,419		(2,936)		483		3,419		(2,896)		523
Total	$	20,734	$	(18,040)	$	2,694	$	20,694	$	(17,623)	$	3,071


Table 5.2: Depreciation and Amortization Expense
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands)
Depreciation and amortization expense	$	457	$	445

SEGMENT INFORMATION - Narrative (Details)	3 Months Ended
SEGMENT INFORMATION - Narrative (Details)	Mar. 31, 2026 segment
Segment Reporting [Abstract]
Number of reportable segments	2
Number of operating segments	2

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Mar. 31, 2026
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2026 USD ($)
2025 Restructuring Plan
Business Combination [Line Items]
Restructuring charges	$ 1.5

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References + Details

SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 50,230	$ 53,180
Restricted cash	140	140
Cash, cash equivalents, and restricted cash	$ 50,370	$ 53,320	$ 57,930	$ 54,717

OTHER BALANCE SHEET COMPONENTS - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Inventories, net	$ 2,890	$ 996
Deferred costs	791	887
Receivables - other	0	529
Other	0	1,250
Other current assets	$ 3,681	$ 3,662

STOCK-BASED COMPENSATION

3 Months Ended

Mar. 31, 2026

Share-Based Payment Arrangement [Abstract]

STOCK-BASED COMPENSATION

On May 7, 2026, the Company's stockholders approved Amendment No. 2 to the Amended and Restated 2016 Omnibus Long-Term Incentive Plan ("2016 LTIP") that increased the number of shares available for issuance under the 2016 LTIP by an additional 5,380,000 shares.

As of March 31, 2026, approximately 0.5 million shares of our common stock were available for future grants under the 2016 LTIP. There were no income tax benefits recognized on the share-based compensation expense (as reflected on the table below) for the three months ended March 31, 2026, and 2025.


Table 10.1: Details of Stock Compensation Expense by Statements of Operations Line Item
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands)
Cost of sales – services	$	216	$	190
Research and development	219		40
Selling, general and administrative	2,536		6,818
Total	$	2,971	$	7,048

Restricted Stock


Table 10.2: Restricted Stock Activity
	Service-Based	Performance-Based	Total Shares	Weighted-Average Grant Date Fair Value
Unvested outstanding units as of December 31, 2025	2,182,836	10,861,854	13,044,690	$	3.49
Granted	991,756	—	991,756	4.02
Vested	(991,756)	(2,420,691)	(3,412,447)	3.42
Forfeited	(27,255)	—	(27,255)	3.70
Unvested outstanding units as of March 31, 2026	2,155,581	8,441,163	10,596,744	$	3.27

As of March 31, 2026, and 2025, the intrinsic value of the restricted stock units with time-base vesting ("RSUs") and restricted stock units with performance-based vesting ("PSUs") outstanding, exercisable, and vested or expected to vest was $44.4 million and $29.5 million, respectively. There were approximately $6.8 million of total compensation costs related to stock-based awards not yet recognized as of March 31, 2026, which is expected to be recognized on a straight-line basis over a weighted-average remaining vesting period of 0.4 years.

Stock Options


Table 10.3: Stock Option Activity
	Stock Options Outstanding	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Outstanding option balance as of December 31, 2025	227,000	$	1.80	7.4	$	749,100
Granted	—	—		0.0	—
Exercised	—	—		0.0	—
Forfeited, cancelled, or expired	—	—		0.0	—
Outstanding option balance as of March 31, 2026	227,000	$	1.80	7.1	$	542,530
Exercisable stock option as of March 31, 2026	227,000	$	1.80	7.1	$	542,530

The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the quoted closing price of the Company's common stock as of March 31, 2026.

The fair value of the stock options is expensed on a straight-line basis over the vesting period of one year, including the stock options granted to directors, as the next annual stockholders meeting is expected to occur at the same approximate time each year.

As of March 31, 2026, there were no unrecognized compensation costs related to non-vested stock options.

ACCOUNTS RECEIVABLE, NET - Schedule of Accounts, Notes, Loans and Financing Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Accounts Receivable, after Allowance for Credit Loss [Abstract]
Billed accounts receivable	$ 10,009	$ 9,416
Unbilled accounts receivable	6,003	6,962
Contract assets	454	663
Allowance for credit losses	(41)	(41)
Accounts receivable, net	$ 16,425	$ 17,000

ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2026 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 95,950
Other comprehensive loss before reclassification, net of tax	(8)
Ending balance	96,531
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(96)
Ending balance	(104)
Foreign currency translation adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(177)
Other comprehensive loss before reclassification, net of tax	(8)
Ending balance	(185)
Pension liability adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	81
Other comprehensive loss before reclassification, net of tax	0
Ending balance	$ 81

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

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+ Details

STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
	May 07, 2026	Mar. 31, 2026	Mar. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value, outstanding, exercisable, and vested or expected to vest		$ 44,400	$ 29,500
Unrecognized stock-based compensation expense		$ 6,800
Weighted-average remaining vesting period		4 months 24 days
Unrecognized compensation costs related to non-vested stock options		$ 0
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares available for issuance (in shares)	5,380
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		1 year
2016 Omnibus Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grant (in shares)		500

SHARE REPURCHASES - Narrative (Details) - USD ($) $ in Millions	Mar. 12, 2026	Mar. 31, 2026	May 24, 2022
Equity [Abstract]
Stock repurchase program, authorized amount			$ 50.0
Stock repurchased and retired during period	$ 25.0
Stock repurchase program, remaining authorized repurchase amount		$ 47.9

OTHER BALANCE SHEET COMPONENTS - Schedule of Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accrued project expenses	$ 4,321	$ 4,289
Restructuring expenses accrual	1,071	1,451
Other	1,222	1,160
Accrued liabilities	$ 6,614	$ 6,900

REVOLVING CREDIT FACILITY	3 Months Ended
REVOLVING CREDIT FACILITY	Mar. 31, 2026
Debt Disclosure [Abstract]
REVOLVING CREDIT FACILITY	REVOLVING CREDIT FACILITY On December 30, 2022, we entered into a Credit Agreement (the "Credit Agreement"), by and among the Company, as borrower, Xacta Corporation, ubIQuity.com, inc., Teloworks, Inc., and Telos Identity Management Solutions, LLC, as guarantors, the lenders party thereto (the "Lenders"), and JPMorgan Chase Bank N.A. ("JPMorgan Chase"), as administrative agent for the Lenders (in such capacity, the "Agent"). The Credit Agreement provided for a $30.0 million senior secured revolving credit facility, with the option of issuing letters of credit thereunder with a sub-limit of $5.0 million, and with an uncommitted expansion feature of up to $30.0 million of additional revolver capacity (the "Loan"). The Loan is subject to acceleration in the event of customary events of default. The Company has not drawn any amount under the Loan. Until December 30, 2025, borrowings under the Credit Agreement accrued interest, at our option, at one of three variable rates, plus a specified margin. We can elect to borrow at (i) the Alternative Base Rate, plus 0.9%; (ii) Adjusted Daily Simple Secured Overnight Financing Rate ("SOFR"), plus 1.9%; or (iii) Adjusted Term SOFR, plus 1.9%, as such capitalized terms are defined and calculated in the Credit Agreement. The Company may elect to convert borrowings from one type of borrowing to another type per the terms of the Credit Agreement. After the occurrence and during the continuance of any event of default, the interest rate may increase by an additional 2.0%. We are obligated to pay accrued interest (i) with respect to amounts accruing interest based on the Alternative Base Rate, each calendar quarter and on the maturity date, (ii) with respect to amounts accruing interest based on Adjusted Daily Simple SOFR, on each one-month anniversary of the borrowing and on the maturity date, and (iii) with respect to amounts accruing interest based on Adjusted Term SOFR, at the end of the period specified per the Credit Agreement and on the maturity date. Upon five, three, or one day's prior notice, as applicable, we may prepay any portion or the entire amount of the Loan. The Loan under the Credit Agreement is collateralized by substantially all of the Company's assets, including the Company's pledge of its domestic and material foreign subsidiary equity interests. The Loan has various covenants that may, among other things, affect our ability to create, incur, assume or suffer any indebtedness, merge into or consolidate with another entity, acquire entity interests, sell or transfer certain assets, enter into certain arrangements (such as sale and leaseback and swap agreements) or restrictive agreements, pay dividends and make certain restricted payments, and amend material documents related to any subordinated indebtedness and corporate agreements. The Credit Agreement also requires certain financial covenants to maintain a Senior Leverage Ratio on the last day of any fiscal quarter, no greater than 3 to 1. We were in compliance with all covenants as of March 31, 2026. The occurrence of an event of default under the Credit Agreement could result in the Loan and other obligations becoming immediately due and payable and allow the Lenders to exercise all rights and remedies available to them under the Credit Agreement. On April 12, 2023, the Credit Agreement was amended to exclude from collateral the (i) amount collectible from a third party related to an Accounts Receivable Purchase Agreement and (ii) receivables generated by the Company from the sale of goods supplied to this third party in an amount not to exceed $25.0 million. On December 30, 2025, the Company entered into a Second Amendment to Credit Agreement (the "Second Amendment") with JPMorgan Chase. The Second Amendment modified the Credit Agreement to, among other modifications, (a) established the Applicable Rate for borrowings under the revolving credit facility at 1.25% for ABR Loans and 2.25% for Term Benchmark/RFR Loans, with a commitment fee rate of 0.25%, (b) established the Revolving Commitment under the Credit Agreement at $15.0 million with an expansion feature of up to $15.0 million of additional credit capacity, (c) extended the Revolving Credit Maturity Date to December 30, 2026, and (d) required the Company and its subsidiaries to maintain at least $5.0 million of unrestricted cash and Permitted Investments with JPMorgan Chase at all times. Except as modified by the Second Amendment, the terms and conditions of the Credit Agreement remain in full force and effect.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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+ Details

Cover - shares	3 Months Ended
Cover - shares	Mar. 31, 2026	May 04, 2026
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2026
Document Transition Report	false
Entity File Number	001-08443
Entity Registrant Name	TELOS CORPORATION
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	52-0880974
Entity Address, Address Line One	19886 Ashburn Road
Entity Address, City or Town	Ashburn
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	20147-2358
City Area Code	703
Local Phone Number	724-3800
Title of 12(b) Security	Common stock, $0.001 par value per share
Trading Symbol	TLS
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		74,819,175
Entity Central Index Key	0000320121
Current Fiscal Year End Date	--12-31
Amendment Flag	false
Document Fiscal Year Focus	2026
Document Fiscal Period Focus	Q1

INTANGIBLE ASSETS, NET - Schedule of Amortization Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Finite-Lived Intangible Assets [Line Items]
Software development costs - cost of sales	$ 2,492	$ 1,411
Total	2,605	1,524
General and administrative
Finite-Lived Intangible Assets [Line Items]
Other intangible assets - general and administrative	$ 113	$ 113

- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets.

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+ Details

ACCUMULATED OTHER COMPREHENSIVE LOSS

3 Months Ended

Mar. 31, 2026

Equity [Abstract]

ACCUMULATED OTHER COMPREHENSIVE LOSS


Table 12: Details of Changes in Accumulated Other Comprehensive Loss by Category
	Foreign currency translation adjustment		Pension liability adjustment		Total

	(in thousands)
Balance as of December 31, 2025	$	(177)	$	81	$	(96)
Other comprehensive loss before reclassification, net of tax	(8)		—		(8)
Balance as of March 31, 2026	$	(185)	$	81	$	(104)

OTHER BALANCE SHEET COMPONENTS - Schedule of Other Assets (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) $ / shares shares	Mar. 31, 2026 USD ($)	Mar. 31, 2024 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Investment	$ 3,750	$ 3,750
Prepaid expenses and deferred commission – long-term portion	537	563
Restricted cash	140	140
Other	86	90
Other assets	$ 4,513	$ 4,543
Investment owned cost			$ 3,000
Conversion of investment, shares issued \| shares	8,964,262
Conversion share price (in dollars per share) \| $ / shares	$ 0.42
Ownership interest after conversion	0.038
Fair value of investment	$ 3,800

COMMITMENTS, CONTINGENCIES AND SUBSEQUENT EVENTS	3 Months Ended
COMMITMENTS, CONTINGENCIES AND SUBSEQUENT EVENTS	Mar. 31, 2026
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS, CONTINGENCIES AND SUBSEQUENT EVENTS	COMMITMENTS, CONTINGENCIES AND SUBSEQUENT EVENTS Legal Proceedings From time to time, the Company may be a party to litigation or claims arising in the ordinary course of business, including those relating to employment matters, relationships with clients and contractors, intellectual property disputes, and other business matters. These legal proceedings typically seek various remedies, including claims for monetary damages in varying amounts or unspecified amounts. Although the outcome of any such matter is inherently uncertain and may be materially adverse, based on current information, management believes that the outcome of any such known matters will not have a material adverse effect on the Company's business or its unaudited consolidated financial statements as of March 31, 2026. Other - Government Contracts As a U.S. federal government contractor, we are subject to various audits and investigations by the U.S. federal government to determine whether our operations are being conducted in accordance with applicable regulatory requirements. U.S. federal government investigations of our operations, whether relating to government contracts or conducted for other reasons, could result in administrative, civil, or criminal liabilities, including repayments, fines or penalties being imposed upon us, suspension, proposed debarment, debarment from eligibility for future U.S. federal government contracting, or suspension of export privileges. Suspension or debarment could have a material adverse effect on us because of our dependence on contracts with the U.S. federal government. U.S. federal government investigations often take years to complete and many result in no adverse action against us. We also provide products and services to customers outside the United States, which are subject to U.S. and foreign laws and regulations and foreign procurement policies and practices. Our compliance with local regulations or applicable U.S. federal government regulations may also be audited or investigated. Subsequent Events On April 29, 2026, the Company announced that John Wood, the President, CEO and Chairman of the Board, was taking a medical leave of absence. Effective April 28, 2026, Mark Griffin, Executive Vice President, Security Solutions, Mark Bendza, Executive Vice President and Chief Financial Officer, and Hutch Robbins, Executive Vice President and General Counsel (under the oversight of and reporting to the Company’s Board) have assumed the responsibilities of the Chief Executive Officer on an interim basis. Fred Schaufeld has been appointed by the Board of Directors to serve as its Chairman on an interim basis effective immediately. The Board and executive leadership team are working closely to ensure continuity of the Company’s operations during Mr. Wood’s absence. The Company does not anticipate material disruption to its operations.

REVENUE RECOGNITION - Schedule of Revenue by Customer Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 47,742	$ 30,616
Security Solutions segment
Disaggregation of Revenue [Line Items]
Total revenue	45,970	25,818
Secure Networks segment
Disaggregation of Revenue [Line Items]
Total revenue	1,772	4,798
Revenue from Contract with Customer, Product and Service Benchmark \| Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Total revenue	$ 47,742	$ 30,616
Concentration risk, percentage	100.00%	100.00%
Revenue from Contract with Customer, Product and Service Benchmark \| Customer Concentration Risk \| Firm fixed-price
Disaggregation of Revenue [Line Items]
Total revenue	$ 37,461	$ 19,998
Concentration risk, percentage	79.00%	65.00%
Revenue from Contract with Customer, Product and Service Benchmark \| Customer Concentration Risk \| Time-and-materials
Disaggregation of Revenue [Line Items]
Total revenue	$ 8,662	$ 8,377
Concentration risk, percentage	18.00%	28.00%
Revenue from Contract with Customer, Product and Service Benchmark \| Customer Concentration Risk \| Cost plus fixed fee
Disaggregation of Revenue [Line Items]
Total revenue	$ 1,619	$ 2,241
Concentration risk, percentage	3.00%	7.00%
Federal \| Revenue from Contract with Customer, Product and Service Benchmark \| Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Total revenue	$ 44,204	$ 27,301
Concentration risk, percentage	93.00%	89.00%
Federal \| Revenue from Contract with Customer, Segment Benchmark \| Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Total revenue	$ 44,204	$ 27,301
Federal \| Revenue from Contract with Customer, Segment Benchmark \| Customer Concentration Risk \| Security Solutions segment
Disaggregation of Revenue [Line Items]
Total revenue	42,432	22,652
Federal \| Revenue from Contract with Customer, Segment Benchmark \| Customer Concentration Risk \| Secure Networks segment
Disaggregation of Revenue [Line Items]
Total revenue	1,772	4,649
State & local, and commercial \| Revenue from Contract with Customer, Product and Service Benchmark \| Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,538	$ 3,315
Concentration risk, percentage	7.00%	11.00%

ACCOUNTS RECEIVABLE, NET - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025	Mar. 10, 2026
Financing Receivable, Allowance for Credit Loss [Line Items]
Maximum purchased receivables			$ 10,000,000.0
Sold receivables during the period	$ 0
Federal \| Accounts Receivable \| Customer Concentration Risk
Financing Receivable, Allowance for Credit Loss [Line Items]
Concentration risk, percentage	88.00%	85.00%

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References + Details

EARNINGS (LOSS) PER SHARE

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

EARNINGS (LOSS) PER SHARE

Basic EPS is computed by dividing net income (loss) by the basic weighted-average number of common shares outstanding for the period. Diluted EPS is calculated to give effect to all potentially dilutive common stock equivalents that were outstanding during the reporting period. The dilutive effects of outstanding common stock equivalents are determined using the treasury-stock and if-converted method, only in periods in which such effect would have been dilutive for the period.


Table 13: Weighted-Average Number of Shares Outstanding – Earnings per Share
	For the Three Months Ended
	March 31, 2026	March 31, 2025

	(in thousands)
Basic weighted-average number of shares outstanding	73,822	72,715
Dilutive effect of unvested restricted stock units and stock options	3,793	—
Diluted weighted-average number of shares outstanding	77,615	72,715

For a period of net loss, potentially dilutive securities are not included in the calculation of diluted net earnings (loss) per share, because to do so would be anti-dilutive. For the three months ended March 31, 2025, the diluted earnings per share calculation excludes 627,612 of potentially dilutive securities that were anti-dilutive.

For the three months ended March 31, 2026, and 2025, outstanding PSUs aggregating 6,235,000 and 10,604,187, respectively, have been excluded from the calculation of potentially dilutive securities above because the issuance of shares is contingent upon the satisfaction of certain conditions, which were not satisfied by the end of the period.

OTHER BALANCE SHEET COMPONENTS (Tables)

3 Months Ended

Mar. 31, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Other Current Assets


Table 8.1: Details of Other Current Assets
	March 31, 2026		December 31, 2025

	(in thousands)
Inventories, net	$	2,890	$	996
Deferred costs	791		887
Receivables - other	—		529
Other	—		1,250
Other current assets	$	3,681	$	3,662

Schedule of Other Assets Noncurrent


Table 8.2: Details of Other Assets
	March 31, 2026		December 31, 2025

	(in thousands)
Investment (1)	$	3,750	$	3,750
Prepaid expense and deferred commission – long-term portion	563		537
Restricted cash	140		140
Other	90		86
Other assets	$	4,543	$	4,513

(1) In March 2024, we made a $3.0 million investment in a privately held company via a simple agreement for future equity ("SAFE"). In October 2025, the Company's SAFE investment was settled into 8,964,262 shares of Series A common stock at a settlement price of $0.42 per share, based on the valuation cap in the original agreement, resulting in 3.8% ownership with no significant influence over the privately-held company. Upon settlement of the SAFE, the investment was remeasured to its fair value of $3.8 million. The SAFE investment was settled into equitable shares of the privately-held company's common stock. The investment does not have a readily determinable fair value and the Company elected the measurement alternative to value its investment. The fair value of this investment was based on non-marketable observable inputs, which represent Level 3 measurement within the fair value hierarchy. The investment was carried at cost less impairment, if any, and subsequently measured to fair value upon observable price changes in an orderly transaction for the identical or similar investment of the same issuer, with any gains or losses recorded within "other income" on the unaudited consolidated statement of operations. We did not note any changes in the fair value during the three months ended March 31, 2026, and 2025.

Schedule of Other Current Liabilities


Table 8.3: Details of Accrued Liabilities
	March 31, 2026		December 31, 2025

	(in thousands)
Accrued project expenses	$	4,321	$	4,289
Restructuring expenses accrual	1,071		1,451
Other	1,222		1,160
Accrued liabilities	$	6,614	$	6,900

PROPERTY AND EQUIPMENT, NET

3 Months Ended

Mar. 31, 2026

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT, NET


Table 5.1: Details of Property and Equipment, Net
	March 31, 2026						December 31, 2025
	Gross Carrying Amount		Accumulated Depreciation and Amortization		Net Carrying Value		Gross Carrying Amount		Accumulated Depreciation and Amortization		Net Carrying Value

	(in thousands)
Furniture and equipment	$	17,315	$	(15,104)	$	2,211	$	17,275	$	(14,727)	$	2,548
Leasehold improvements	3,419		(2,936)		483		3,419		(2,896)		523
Total	$	20,734	$	(18,040)	$	2,694	$	20,694	$	(17,623)	$	3,071


Table 5.2: Depreciation and Amortization Expense
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands)
Depreciation and amortization expense	$	457	$	445

SUPPLEMENTAL CASH FLOW INFORMATION - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash paid during the period for:
Interest	$ 109	$ 129
Non-cash investing and financing activities:
Capital expenditure activity in accounts payable and other accrued liabilities	54	288
Issuance of common stock for 401K match	1,659	2,063
Issuance of common stock for AIP payment	$ 3,987	$ 0

REVOLVING CREDIT FACILITY (Details)	Dec. 30, 2025 USD ($) variable_rate day	Apr. 12, 2023 USD ($)	Dec. 30, 2022 USD ($)
Debt Instrument [Line Items]
Maximum senior leverage ratio covenant			3
Receivables excluded from collateral		$ 25,000,000.0
Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, variable rates \| variable_rate	3
Credit Agreement \| Alternative Base Rate \| Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	0.90%
Debt instrument, prior notice period \| day	5
Credit Agreement \| Adjusted Daily Simple Secured Overnight Financing Rate (SOFR) \| Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	1.90%
Debt instrument, prior notice period \| day	3
Credit Agreement \| Adjusted Term Secured Overnight Financing Rate (SOFR) \| Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate	1.90%
Debt instrument, prior notice period \| day	1
Line of Credit \| Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 30,000,000.0
Incremental increase in interest rates in the event of default	2.00%
Line of Credit \| Credit Agreement \| Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity			5,000,000.0
Expansion feature borrowing limit			$ 30,000,000.0
Line of Credit \| Second Amendment To Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 15,000,000.0
Line of credit facility, unused capacity, commitment fee percentage	0.25%
Line of credit facility increase in maximum borrowing capacity	$ 15,000,000.0
Line of credit facility, debt covenants, deposit requirements, amount	$ 5,000,000.0
Line of Credit \| Second Amendment To Credit Agreement \| Alternative Base Rate \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	1.25%
Line of Credit \| Second Amendment To Credit Agreement \| Term Benchmark and RFR Loans \| Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage	2.25%

STOCK-BASED COMPENSATION - Schedule of Stock-Based Compensation Expense Incurred (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	$ 2,971	$ 7,048
Research and development
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	219	40
Selling, general and administrative
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	2,536	6,818
Cost of sales – services \| Cost of sales – services
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total	$ 216	$ 190

STOCK-BASED COMPENSATION - Schedule of Restricted Stock Units Activity (Details)	3 Months Ended
	Mar. 31, 2026 $ / shares shares
Total Shares
Outstanding, beginning balance (in shares)	13,044,690
Granted (in shares)	991,756
Vested (in shares)	(3,412,447)
Forfeited (in shares)	(27,255)
Outstanding, beginning balance (in shares)	10,596,744
Weighted-Average Grant Date Fair Value
Outstanding, beginning balance (in dollars per share) \| $ / shares	$ 3.49
Granted (in dollars per share) \| $ / shares	4.02
Vested (in dollars per share) \| $ / shares	3.42
Forfeited (in dollars per share) \| $ / shares	3.70
Outstanding, ending balance (in dollars per share) \| $ / shares	$ 3.27
Service-Based
Total Shares
Outstanding, beginning balance (in shares)	2,182,836
Granted (in shares)	991,756
Vested (in shares)	(991,756)
Forfeited (in shares)	(27,255)
Outstanding, beginning balance (in shares)	2,155,581
Performance-Based
Total Shares
Outstanding, beginning balance (in shares)	10,861,854
Granted (in shares)	0
Vested (in shares)	(2,420,691)
Forfeited (in shares)	0
Outstanding, beginning balance (in shares)	8,441,163

CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Total revenue	$ 47,742	$ 30,616
Depreciation and amortization	2,596	1,503
Total cost of sales	30,367	18,434
Gross profit	17,375	12,182
Operating expenses:
Research and development expenses	1,357	1,571
Selling, general and administrative expenses	14,563	19,633
Total operating expenses	15,920	21,204
Operating income (loss)	1,455	(9,022)
Other income	697	561
Interest expense	(111)	(147)
Income (loss) before income taxes	2,041	(8,608)
(Provision for) benefit from income taxes	(18)	4
Net income (loss)	$ 2,023	$ (8,604)
Net income (loss) per share:
Basic (in dollars per share)	$ 0.03	$ (0.12)
Diluted (in dollars per share)	$ 0.03	$ (0.12)
Weighted-average number of shares outstanding:
Basic weighted-average number of shares outstanding (in shares)	73,822	72,715
Diluted (in shares)	77,615	72,715
Service
Total revenue	$ 42,061	$ 28,845
Cost of sales	23,239	15,491
Product
Total revenue	5,681	1,771
Cost of sales	$ 4,532	$ 1,440

SHARE REPURCHASES - Share Repurchases Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Equity [Abstract]
Amount paid for shares repurchased	$ 2,198	$ 0
Number of shares repurchased (in shares)	517,136	0
Average per share price paid (in dollars per share)	$ 4.25	$ 0

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Assets:
Cash and cash equivalents	$ 50,230	$ 53,180
Accounts receivable, net	16,425	17,000
Prepaid expenses	10,963	10,565
Deferred program expenses	14,326	10,006
Other current assets	3,681	3,662
Total current assets	95,625	94,413
Property and equipment, net	2,694	3,071
Finance lease right-of-use assets, net	3,865	4,170
Operating lease right-of-use assets, net	354	410
Goodwill	3,006	3,006
Intangible assets, net	29,808	30,281
Other assets	4,543	4,513
Total assets	139,895	139,864
Liabilities:
Accounts payable	2,583	4,087
Accrued liabilities	6,614	6,900
Accrued compensation and benefits	7,363	12,309
Contract liabilities – current portion	18,096	11,223
Finance lease obligations – current portion	2,072	2,033
Operating lease obligations – current portion	254	232
Total current liabilities	36,982	36,784
Contract liabilities – non-current portion	951	1,124
Finance lease obligations – non-current portion	5,078	5,608
Operating lease obligations – non-current portion	125	186
Deferred income taxes	55	53
Other liabilities	173	159
Total liabilities	43,364	43,914
Commitments and contingencies
Stockholders’ equity:
Common stock, $0.001 par value, 250,000,000 shares authorized, 74,819,175 shares and 72,773,272 shares issued and outstanding as of March 31, 2026, and December 31, 2025, respectively	113	111
Additional paid-in capital	458,392	459,828
Accumulated other comprehensive loss	(104)	(96)
Accumulated deficit	(361,870)	(363,893)
Total stockholders’ equity	96,531	95,950
Total liabilities and stockholders’ equity	$ 139,895	$ 139,864

OTHER BALANCE SHEET COMPONENTS

3 Months Ended

Mar. 31, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

OTHER BALANCE SHEET COMPONENTS


Table 8.1: Details of Other Current Assets
	March 31, 2026		December 31, 2025

	(in thousands)
Inventories, net	$	2,890	$	996
Deferred costs	791		887
Receivables - other	—		529
Other	—		1,250
Other current assets	$	3,681	$	3,662


Table 8.2: Details of Other Assets
	March 31, 2026		December 31, 2025

	(in thousands)
Investment (1)	$	3,750	$	3,750
Prepaid expense and deferred commission – long-term portion	563		537
Restricted cash	140		140
Other	90		86
Other assets	$	4,543	$	4,513


Table 8.3: Details of Accrued Liabilities
	March 31, 2026		December 31, 2025

	(in thousands)
Accrued project expenses	$	4,321	$	4,289
Restructuring expenses accrual	1,071		1,451
Other	1,222		1,160
Accrued liabilities	$	6,614	$	6,900

GOODWILL	3 Months Ended
GOODWILL	Mar. 31, 2026
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL	GOODWILLThe goodwill balance was $3.0 million as of March 31, 2026, and December 31, 2025, allocated to the Security Solutions segment. Goodwill is subject to annual impairment tests and if triggering events are present in the interim before the annual tests, we will assess impairment. No impairment charges were recorded for the three months ended March 31, 2026, and 2025

- Definition

The entire disclosure for goodwill.

+ References + Details

SUPPLEMENTAL CASH FLOW INFORMATION

3 Months Ended

Mar. 31, 2026

Supplemental Cash Flow Elements [Abstract]

SUPPLEMENTAL CASH FLOW INFORMATION


Table 15.1: Details of Cash, Cash Equivalents, and Restricted Cash
	March 31, 2026		December 31, 2025

	(in thousands)
Cash and cash equivalents	$	50,230	$	53,180
Restricted cash (1)	140		140
Cash, cash equivalents, and restricted cash	$	50,370	$	53,320

(1) Restricted cash consists of a commercial money market account held as a deposit on the Ashburn lease and is included within "Other assets" on the unaudited consolidated balance sheets.


Table 15.2: Supplemental Cash Flow Information
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands)
Cash paid during the period for:
Interest	$	109	$	129
Non-cash investing and financing activities:
Capital expenditure activity in accounts payable and other accrued liabilities	$	54	$	288
Issuance of common stock for 401K match	1,659		2,063
Issuance of common stock for AIP payment	3,987		—

EARNINGS (LOSS) PER SHARE - Narrative (Details) - shares	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share, amount (in shares)		627,612
Unvested antidilutive stock units excluded from the dilutive effect (stock units) (in shares)	6,235,000	10,604,187

ORGANIZATION (Details)	Mar. 31, 2026
Telos ID
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Business acquisition, percentage of voting interests acquired	100.00%

ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)

3 Months Ended

Mar. 31, 2026

Equity [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)


Table 12: Details of Changes in Accumulated Other Comprehensive Loss by Category
	Foreign currency translation adjustment		Pension liability adjustment		Total

	(in thousands)
Balance as of December 31, 2025	$	(177)	$	81	$	(96)
Other comprehensive loss before reclassification, net of tax	(8)		—		(8)
Balance as of March 31, 2026	$	(185)	$	81	$	(104)

EARNINGS (LOSS) PER SHARE - Schedule of Weighted Average Number of Shares (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Basic weighted-average number of shares outstanding (in shares)	73,822	72,715
Dilutive effect of unvested restricted stock units and stock options	3,793	0
Diluted weighted-average number of shares outstanding (in shares)	77,615	72,715

ACCOUNTS RECEIVABLE, NET

3 Months Ended

Mar. 31, 2026

Receivables [Abstract]

ACCOUNTS RECEIVABLE, NET


Table 4: Details of Accounts Receivable, Net
	March 31, 2026		December 31, 2025

	(in thousands)
Billed accounts receivable	$	10,009	$	9,416
Unbilled accounts receivable	6,003		6,962
Contract assets	454		663
Allowance for credit losses (1)	(41)		(41)
Accounts receivable, net	$	16,425	$	17,000

(1) Includes recoveries from credit losses, net of provision.

Because our primary customer base includes agencies of the U.S. federal government, we have a concentration of credit risk associated with our accounts receivable, as 88% and 85% of our billed and unbilled accounts receivable as of March 31, 2026, and December 31, 2025, respectively, were with U.S. federal government customers. While we acknowledge the potential material and adverse risk of such a significant concentration of credit risk, our past experience collecting substantially all of such receivables provides us with an informed basis that such risk, if any, is manageable. We perform ongoing credit evaluations of all of our customers and generally do not require collateral or other guarantees from our customers. We maintain allowances for potential losses, where appropriate.

On March 10, 2026, we entered into a new Factoring Agreement with an unrelated third-party (the "Factor"). Under this Factoring Agreement, we may offer eligible accounts receivable arising from our U.S. government prime contracts or subcontracts for sale (the "Purchased Receivables") to the Factor, and the Factor may purchase such receivables at its sole discretion, on a non-recourse basis. These transactions are accounted for as a "true sale" as we have surrendered control over the receivables, and is not obligated to repay all or any portion of the advance amount if any portion of the accounts receivable is not paid by the customers due to an inability to pay. The total amount of Purchased Receivables is subject to a maximum limit of $10.0 million of outstanding Purchased Receivables at any given time. The initial term of the Factoring Agreement expires on March 10, 2027, and automatically renews annually thereafter unless terminated in writing by the parties. There were no accounts receivables sold during the three months ended March 31, 2026.

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance (in shares) at Dec. 31, 2024		72,515,000
Beginning balance at Dec. 31, 2024	$ 127,137	$ 111	$ 454,502	$ (129)	$ (327,347)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(8,604)				(8,604)
Foreign currency translation gain (loss)	80			80
Actuarial gain on pension liability adjustment	8			8
Restricted stock unit awards vested, net of shares withheld to cover tax withholding (in shares)		76,000
Restricted stock unit awards vested, net of shares withheld to cover tax withholding	(104)	$ 0	(104)
Stock-based compensation	5,534		5,534
Issuance of common stock for 401K match (in shares)		728,000
Issuance of common stock for 401K match	2,063	$ 1	2,062
Ending balance (in shares) at Mar. 31, 2025		73,319,000
Ending balance at Mar. 31, 2025	$ 126,114	$ 112	461,994	(41)	(335,951)
Beginning balance (in shares) at Dec. 31, 2025	72,773,272	72,773,000
Beginning balance at Dec. 31, 2025	$ 95,950	$ 111	459,828	(96)	(363,893)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,023				2,023
Foreign currency translation gain (loss)	(8)			(8)
Repurchase of common stock (in shares)		(517,000)
Repurchase of common stock	(2,198)		(2,198)
Actuarial gain on pension liability adjustment	0
Restricted stock unit awards vested, net of shares withheld to cover tax withholding (in shares)		1,444,000
Restricted stock unit awards vested, net of shares withheld to cover tax withholding	(5,400)	$ 1	(5,401)
Stock-based compensation	1,738		1,738
Issuance of common stock for annual incentive plan ("AIP") payment, net of shares withheld to cover tax withholding (in shares)		706,000
Issuance of common stock for annual incentive plan ("AIP") payment, net of shares withheld to cover tax withholding	2,767	$ 1	2,766
Issuance of common stock for 401K match (in shares)		413,000
Issuance of common stock for 401K match	$ 1,659		1,659
Ending balance (in shares) at Mar. 31, 2026	74,819,175	74,819,000
Ending balance at Mar. 31, 2026	$ 96,531	$ 113	$ 458,392	$ (104)	$ (361,870)

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net income (loss)	$ 2,023	$ (8,604)
Adjustments to reconcile net income (loss) to cash flows from operations:
Stock-based compensation	2,971	7,048
Depreciation and amortization	3,429	2,336
Loss on disposal of fixed assets	51	0
Amortization of debt issuance costs	8	17
Provision for (benefit from) deferred income tax	2	(4)
Provision for (recovery from) doubtful accounts	1	(5)
Changes in other operating assets and liabilities:
Accounts receivable	575	427
Prepaid expenses, deferred program expenses, other current assets and other assets	(3,749)	3,016
Accounts payable	(1,564)	(88)
Accrued compensation and benefits	(533)	375
Contract liabilities	6,699	(93)
Accrued liabilities and other liabilities	(1,257)	1,681
Net cash provided by operating activities	8,656	6,106
Cash flows from investing activities:
Capitalized software development costs	(2,132)	(2,214)
Purchases of property and equipment	(145)	(123)
Net cash used in investing activities	(2,277)	(2,337)
Cash flows from financing activities:
Payments under finance lease obligations	(491)	(452)
Payment of tax withholding related to net share settlement of equity awards	(6,619)	(104)
Repurchases of common stock	(2,198)	0
Payments for debt issuance costs	(21)	0
Net cash used in financing activities	(9,329)	(556)
Net change in cash, cash equivalents, and restricted cash	(2,950)	3,213
Cash, cash equivalents, and restricted cash, beginning of period	53,320	54,717
Cash, cash equivalents, and restricted cash, end of period	$ 50,370	$ 57,930

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,023	$ (8,604)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(8)	80
Actuarial gain on pension liability adjustment	0	8
Comprehensive income (loss)	$ 2,015	$ (8,516)

- Definition

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

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+ Details

ACCOUNTS RECEIVABLE, NET (Tables)

3 Months Ended

Mar. 31, 2026

Receivables [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable


Table 4: Details of Accounts Receivable, Net
	March 31, 2026		December 31, 2025

	(in thousands)
Billed accounts receivable	$	10,009	$	9,416
Unbilled accounts receivable	6,003		6,962
Contract assets	454		663
Allowance for credit losses (1)	(41)		(41)
Accounts receivable, net	$	16,425	$	17,000

(1) Includes recoveries from credit losses, net of provision.

SIGNIFICANT ACCOUNTING POLICIES (Tables)

3 Months Ended

Mar. 31, 2026

Accounting Policies [Abstract]

Schedule of Changes in Restructuring Expenses Accrual


Table 2: Summary of Changes in Restructuring Expenses Accrual
	Severance and related benefit costs(1)

	(in thousands)
Balance at December 31, 2025	$	1,451
Cash payments	(380)
Balance at March 31, 2026	$	1,071

SHARE REPURCHASES

3 Months Ended

Mar. 31, 2026

Equity [Abstract]

SHARE REPURCHASES

On May 24, 2022, the Company announced that the Board of Directors ("Board") approved a new share repurchase program ("SRP") authorizing the Company to repurchase up to $50.0 million of its common stock. On March 12, 2026, the Board further authorized the Company to repurchase up to an additional $25.0 million of its common stock under its existing repurchase program. Pursuant to this authorization, the Company may repurchase shares of its common stock on a discretionary basis from time to time through open market purchases. The repurchase program has no expiration date and may be modified, suspended, or terminated at any time. As of March 31, 2026, there was approximately $47.9 million of the authorization remaining for future common stock repurchases under the SRP.


Table 11: Share Repurchase Program Activity
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands, except per share and share data)
Amounts paid for shares repurchased (1)	$	2,198	$	—
Number of shares repurchased	517,136		—
Average per share price paid (1)	$	4.25	$	—

(1) Includes commissions paid for repurchases on the open market.

REVENUE RECOGNITION (Tables)

3 Months Ended

Mar. 31, 2026

Revenue from Contract with Customer [Abstract]

Schedule of Revenue by Customer Type


Table 3.1: Revenue by Customer Type
	For the Three Months Ended
	March 31, 2026			March 31, 2025
	Amount		%	Amount		%

	(dollars in thousands)
Federal	$	44,204	93 %	$	27,301	89 %
State & local, and commercial	3,538		7 %	3,315		11 %
Total revenue	$	47,742	100 %	$	30,616	100 %


Table 3.2: Revenue by Contract Type
	For the Three Months Ended
	March 31, 2026			March 31, 2025
	Amount		%	Amount		%

	(dollars in thousands)
Firm fixed-price	$	37,461	79 %	$	19,998	65 %
Time-and-materials	8,662		18 %	8,377		28 %
Cost plus fixed fee	1,619		3 %	2,241		7 %
Total revenue	$	47,742	100 %	$	30,616	100 %

Schedules of Concentration of Risk, by Risk Factor


Table 3.3: Revenue Concentration Greater than 10% of Total Revenue
	For the Three Months Ended
	March 31, 2026		March 31, 2025
Federal government:
Security Solutions segment	$	42,432	$	22,652
Secure Networks segment	1,772		4,649
Total	$	44,204	$	27,301

Schedule of Contract Balances


Table 3.4: Contract Balances
	Balance Sheet Presentation	March 31, 2026		December 31, 2025

		(in thousands)
Billed accounts receivables (1)	Accounts receivable, net	$	9,968	$	9,375
Unbilled accounts receivable	Accounts receivable, net	6,003		6,962
Contract assets	Accounts receivable, net	454		663
Contract liabilities – current	Contract liabilities – current portion	18,096		11,223
Contract liabilities – non-current	Contract liabilities – non-current portion	951		1,124

(1) Net of allowance for credit losses.

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2026	Dec. 31, 2025
Stockholders’ equity:
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, authorized (in shares)	250,000,000	250,000,000
Common stock, issued (in shares)	74,819,175	72,773,272
Common stock, outstanding (in shares)	74,819,175	72,773,272

SHARE REPURCHASES (Tables)

3 Months Ended

Mar. 31, 2026

Equity [Abstract]

Schedule of Share Repurchases Activity


Table 11: Share Repurchase Program Activity
	For the Three Months Ended
	March 31, 2026		March 31, 2025

	(in thousands, except per share and share data)
Amounts paid for shares repurchased (1)	$	2,198	$	—
Number of shares repurchased	517,136		—
Average per share price paid (1)	$	4.25	$	—

(1) Includes commissions paid for repurchases on the open market.

STOCK-BASED COMPENSATION - Schedule of Stock Option Activity (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Stock Options Outstanding
Outstanding option balance at the beginning of period (in shares)	227,000
Granted (in shares)	0
Exercised (in shares)	0
Forfeited, cancelled, or expired (in shares)	0
Outstanding option balance at the end of period (in shares)	227,000	227,000
Exercisable stock option (in shares)	227,000
Weighted-Average Exercise Price
Outstanding option balance at the beginning of period (in dollars per share)	$ 1.80
Granted (in dollars per share)	0
Exercised (in dollars per share)	0
Forfeited, cancelled, or expired (in dollars per share)	0
Outstanding option balance at the end of period (in dollars per share)	1.80	$ 1.80
Exercisable stock option (in dollars per share)	$ 1.80
Stock Options Additional Disclosures
Weighted Average Remaining Contractual Term, Outstanding option balance	7 years 1 month 6 days	7 years 4 months 24 days
Weighted Average Remaining Contractual Term, Exercisable stock option	7 years 1 month 6 days
Aggregate Intrinsic Value, Outstanding option balance	$ 542,530	$ 749,100
Aggregate Intrinsic Value, Exercisable stock option	$ 542,530

SEGMENT INFORMATION

3 Months Ended

Mar. 31, 2026

Segment Reporting [Abstract]

SEGMENT INFORMATION

We operate our business in two reportable and operating segments: Security Solutions and Secure Networks.

•Our Security Solutions segment is primarily focused on cybersecurity, cloud and identity solutions, and secure messaging through Xacta®, Telos Automated Message Handling System ("AMHS") and Telos ID offerings.

•Our Secure Networks segment provides secure networking architectures and solutions to our customers through secure mobility solutions, and network management and defense services.

We measure each segment's profitability based on gross profit. The Chief Executive Officer ("CEO"), whom we identified as the chief operating decision maker ("CODM"), evaluates the segment's performance based on metrics, such as segment revenue and gross profit, to align with our strategies and objectives, and provide a framework for the timely and rational allocation of resources between the segments.

We account for inter-segment sales and transfers as if the sales or transfers were to third parties, that is, at current market prices, if any. There were no inter-segment sales and transfers during the three months ended March 31, 2026, and 2025. Interest income, interest expense, other income and expense items, and income taxes, as reported in the consolidated financial statements, are not part of the segment profitability measure and are primarily recorded at the corporate level.

Management does not utilize total assets by segment to evaluate segment performance or allocate resources. As a result, assets are not tracked by segment, and therefore, total assets by segment are not disclosed.


Table 14: Results of Operations by Business Segment
	For the Three Months Ended
	March 31, 2026						March 31, 2025
	Security Solutions		Secure Networks		Total		Security Solutions		Secure Networks		Total

	(in thousands)
Revenues	$	45,970	$	1,772	$	47,742	$	25,818	$	4,798	$	30,616
Cost of sales
Depreciation and amortization (1)	2,593		3		2,596		1,501		2		1,503
Stock-based compensation expense (1)	194		22		216		169		21		190
Other segment items (2)	26,320		1,235		27,555		13,088		3,653		16,741
Total cost of sales	29,107		1,260		30,367		14,758		3,676		18,434
Gross profit	$	16,863	$	512	17,375		$	11,060	$	1,122	12,182
Operating expenses:
Research and development expenses					1,357						1,571
Selling, general and administrative expenses					14,563						19,633
Total operating expenses					15,920						21,204
Operating income (loss)					1,455						(9,022)
Other income					697						561
Interest expense					(111)						(147)
Income (loss) before income taxes					2,041						(8,608)
(Provision for) benefit from income taxes					(18)						4
Net income (loss)					$	2,023					$	(8,604)

(1) The significant segment expense categories and amounts align with the segment-level information regularly provided by the CODM.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

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+ Details