Significant Accounting Policies	6 Months Ended
Significant Accounting Policies	Jun. 30, 2022
Accounting Policies [Abstract]
Significant Accounting Policies	SIGNIFICANT ACCOUNTING POLICIES (a)Basis of Presentation The accompanying unaudited consolidated financial statements include the accounts of Telos and its subsidiaries, including Ubiquity.com, Inc., Xacta Corporation, Telos ID, Teloworks, and Telos APAC, 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. (b)Basis of Presentation for Interim Periods Certain information and footnote disclosures normally included for the annual financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("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 in nature) 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, 2021, included in our Annual Report on Form 10-K for the fiscal year then ended (the "2021 10-K"). We have continued to follow the accounting policies set forth in those financial statements. (c)Segment Reporting Operating segments are defined as components of an enterprise for which separate discrete financial information is available and evaluated regularly by the chief operating decision maker (“CODM”), or decision-making group, in deciding how to allocate resources and assess performance. During the fourth quarter of 2021, we reorganized our internal management reporting structure and the financial results evaluated by our CODM; therefore, we changed our operating segments to align with how our CODM currently oversees the business, allocates resources and evaluates operating performance. As a result of the segment reorganization, we reported two reportable and operating segments: Security Solutions and Secure Networks. The segments enable the alignment of our strategies and objectives and provide a framework for timely and rational allocation of resources within the lines of business. We eliminate any inter-segment revenues and expenses upon consolidation. Prior period segment information has been recast to reflect the change. The segment reorganization had no impact on previously reported unaudited consolidated financial results. (d)Basis of Comparison – Revision of Previously Issued Interim Financial Statements The Company recorded certain revisions related to the previously issued unaudited condensed consolidated financial statements. The Company considered the errors identified in accordance with the SEC's Staff Accounting Bulletin No. 99 and determined the impact was immaterial to the previously issued condensed consolidated interim financial statements. Nonetheless, the Company corrected these errors when identified in 2021. During the third quarter of 2021, the Company identified out-of-period adjustments on certain revenue and expense classification. Further, we corrected the cash flow presentation to properly reflect the final payment to fully acquire all of the membership interest of Telos ID as financing activities. Further information regarding the misstatements and related revisions are included in Note 1 8 – R evision of Prior Year Interim Financial Statements to the condensed consolidated financial statements. (e)Use of Estimates The preparation of 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. The most significant items involving management estimates include estimates of revenue recognition, allowance for credit losses, allowance for inventory obsolescence, the valuation allowance for deferred tax assets, the provision for income taxes, share-based compensation, contingencies and litigation, and valuation of intangibles and goodwill. The impact of changes in estimates is recorded in the period in which they become known. (f) Recent Accounting Pronouncements Changes to U.S. GAAP are established by the Financial Accounting Standards Board ("FASB") in the form of Accounting Standards Updates ("ASUs") to the FASB's Accounting Standards Codification ("ASC"). We consider the applicability and impact of all recent ASUs. ASUs not listed below were assessed and determined to be not applicable. Accounting Pronouncements Not Yet Adopted In October 2021, the FASB issued ASU No. 2021-08, “Business Combination (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers,” which requires entities to apply Topic 606 to recognize and measure contract assets and contract liabilities in a business combination. The ASU improves comparability after the business combination by providing consistent recognition and measurement guidance for revenue contracts with customers acquired in a business combination and revenue contracts with customers not acquired in a business combination. Entities should apply the amendments prospectively to business combinations that occur after the effective date. This standard will be effective for reporting periods beginning after December 15, 2022, with early adoption permitted. While we are currently assessing the impact of the adoption of this ASU, we do not believe the adoption of this ASU will have a material impact on our unaudited consolidated financial position, results of operations and cash flows. In June 2022, the FASB issued ASU No. 2022-03, "Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions," which clarifies that a contractual restriction on the sale of an equity security is not considered part of the unit of account of the equity security and, therefore, is not considered in measuring fair value. This standard will be effective for reporting periods beginning December 15, 2023, with early adoption permitted. While we are currently assessing the impact of the adoption of this ASU, we do not believe the adoption of this ASU will have a material impact on our unaudited consolidated financial position, results of operations and cash flows.