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Contract Balances Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Document Period End Date Document Period End Date Share-based Payment Arrangement, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Issuance of common stock on APIC Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Total assets Assets Net loss per share: Net loss per share attributable to Telos Corporation Earnings Per Share [Abstract] Income Statement Location [Axis] Income Statement Location [Axis] Share-based Payment Arrangement, Tranche Three Share-Based Payment Arrangement, Tranche Three [Member] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Performance-Based RSU Performance Shares [Member] Accrued liabilities Accrued Liabilities, Current Schedule of Accounts Payable and Accrued 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Wood Emmett Wood [Member] A person serving as an employee since 1996 and relative (brother) of Chairman and CEO. 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from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Cash, cash equivalents and restricted cash, beginning of period Cash, cash equivalents and restricted cash, end of period Cash, cash equivalents, and restricted cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Foreign currency translation gain (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Unvested antidilutive stock units excluded from the dilutive effect (stock units) (in shares) Incremental Common Shares Excluded From The Dilutive Effect Incremental Common Shares Excluded From The Dilutive Effect Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Liabilities: Liabilities, Current [Abstract] Common stock, shares issued (in shares) Common Stock, Shares, Issued Contract liabilities Contract liabilities Contract with 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Property and equipment, net Property and equipment, net Property, Plant and Equipment, Net Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Sales and marketing Selling and Marketing Expense [Member] State & local, and commercial State & Local, and Commercial [Member] Legal entity that is the governing authority of a state or local community as well as a legal entity in the form of a corporation created to conduct business. Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Current Firm fixed-price Fixed-Price Contract [Member] Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Other income/(expense) Other Nonoperating Income (Expense) Organization Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Sale of stock, price per share (in dollars per share) Sale of Stock, Price Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Furniture and equipment Furniture And Equipment [Member] Furniture And Equipment Condensed Consolidated Statement of Comprehensive Loss Statement of Comprehensive Income [Abstract] Maximum Maximum [Member] Accumulated other comprehensive loss Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Unvested restricted stock and restricted stock units Share-Based Payment Arrangement [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Contract liabilities Increase (Decrease) in Contract with Customer, Liability Total current assets Assets, Current Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Business Acquisition [Line Items] Business Acquisition [Line Items] Entity Small Business Entity Small Business Telos ID Telos ID [Member] Another company which is controlled, directly or indirectly, by its parent. The usual condition for control is ownership of a majority (over 50%) of the outstanding voting stock. The power to control may also exist with a lesser percentage of ownership, for example, by contract, lease, agreement with other stockholders or by court decree. Impact of ownership interest on APIC Impact of Stock Issuance to Additional Paid in Capital from Business Combination Amount of increase in additional paid-in capital from a business combination. 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Enlightenment Capital Solutions Fund II LP [Member] Any person who, directly or indirectly, through any contract, arrangement, understanding, relationship, or otherwise has shares of the entity with 1) voting power which includes the power to vote, or to direct the voting of, such security, and/or 2) investment power which includes the power to dispose, or to direct the disposition of, such security. 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Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Total consideration transferred Business Combination, Consideration Transferred Others Other Accrued Liabilities, Current Selling, general and administrative expenses: Selling, General and Administrative Expense [Abstract] City Area Code City Area Code Assets: Assets [Abstract] General and administrative General and Administrative Expense Changes in other operating assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Revision of Prior Period, Adjustment Revision of Prior Period, Adjustment [Member] Condensed Consolidated Statement of Changes in Stockholders' Equity Statement of Stockholders' Equity [Abstract] Sale of Stock [Axis] Sale of Stock [Axis] Revenue, remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Percentage Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Net proceeds from initial public offering Proceeds from Issuance Initial Public Offering Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Other liabilities Other Liabilities, Noncurrent Other current liabilities and other liabilities Increase (Decrease) in Other Operating Liabilities Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Research and development Research and Development Expense [Member] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Telos ID, Teloworks and Telos APAC Telos ID, Teloworks And Telos APAC [Member] Telos ID, Teloworks And Telos APAC Operating lease ROU assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Cost of sales – services Cost of Sales [Member] Customer [Domain] Customer [Domain]