Grants in period (in shares) Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Document Type Document Type Other income (expense) Other Nonoperating Income (Expense) Commitments, Contingencies and Subsequent Events Commitments and Contingencies Disclosure [Text Block] Related Party [Axis] Related Party [Axis] Services Service [Member] Noncontrolling Interest [Table] Noncontrolling Interest [Table] Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Stock repurchased during period (in shares) Stock Repurchased During Period, Shares Software Development Costs Research, Development, and Computer Software, Policy [Policy Text Block] Statistical Measurement [Domain] Statistical Measurement [Domain] LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Distributions Distributions Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Amortization of right-of-use assets Finance Lease, Right-of-Use Asset, Amortization Deferred income taxes Deferred Income Tax Liabilities, Net Security Exchange Name Security Exchange Name Number of maximum consecutive trading days required for shares to vest Number of Allocated Consecutive Trading Days, Required for Shares to Vest Number of maximum allocated consecutive trading days required for shares to vest for target price. Sales and marketing Selling and Marketing Expense [Member] Repurchase of outstanding warrants Payments for repurchase of warrants Payments for Repurchase of Warrants Operating (loss) income Operating Income (Loss) Total current liabilities Liabilities, Current Accounts Receivable Accounts Receivable [Policy Text Block] Non-controlling Interests/Purchase of Telos ID Noncontrolling Interest Disclosure [Text Block] Contract with Customer, Contract Asset, Contract Liability, and Receivable Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Performance-Based RSU Awards Performance Shares [Member] Agent fee Debt Instrument, Agent Fee Amount Amount of the fee paid to agent for borrowing money under the debt instrument. Nonvested weighted average grant date fair value (in dollars per share) Outstanding, beginning balance (in dollars per share) Outstanding, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Commitments and contingencies (Note 8) Commitments and Contingencies Total lease payments Finance Lease, Liability, Payment, Due Non-controlling interest in APIC Noncontrolling Interest, Increase from Business Combination Share-based Payment Arrangement, Tranche Two Share-based Payment Arrangement, Tranche Two [Member] Repurchase of common stock Payments for repurchase of common stock Payments for Repurchase of Common Stock ASSETS Assets [Abstract] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Award vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 2016 Omnibus Long-Term Incentive Plan 2016 Omnibus Long-Term Incentive Plan [Member] Refers to the 2016 Omnibus Long-Term Incentive Plan. Entity Address, State or Province Entity Address, State or Province Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Cash flows from operating activities - operating leases Operating Lease, Payments Accumulated deficit Retained Earnings (Accumulated Deficit) Operating lease right-of-use assets Operating Lease, Right-of-Use Asset Number of fractional shares (in shares) Stock Issued During Period, Value, Fractional Shares Value of stock issued in fractional to the entity. Gain (loss) on extinguishment of debt Gain (Loss) on Extinguishment of Debt 2022 Lessee, Operating Lease, Liability, to be Paid, Year One Class B Common Stock Common Class B [Member] Income taxes Income Taxes Paid 2022 Finance Lease, Liability, to be Paid, Year One Stockholders’ equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] 2025 Lessee, Operating Lease, Liability, to be Paid, Year Four Unrecognized stock-based compensation expense Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Proceeds from related party, debt Proceeds from Related Party Debt Porter Porter [Member] Any person or group of persons or a combination of person and entity collectively, 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. Customer [Axis] Customer [Axis] Income Taxes Income Tax, Policy [Policy Text Block] Total lease costs Lease, Cost Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Common stock, par or stated value per share (in dollars per share) Common Stock, Par or Stated Value Per Share Other liabilities Other Liabilities, Noncurrent Costs and expenses Cost of Revenue [Abstract] Payments under finance lease obligations Cash flows from financing activities - finance leases Finance Lease, Principal Payments Stock-based compensation APIC, Share-based Payment Arrangement, Increase for Cost Recognition Related party transaction, amounts of transaction Related Party Transaction, Amounts of Transaction Inventories, net of obsolescence reserve of $865 and $851, respectively Inventory, Net Revenue Total Revenue from Contract with Customer, Excluding Assessed Tax Selling, general and administrative expenses Selling, General and Administrative Expense [Abstract] Share-based Payment Arrangement, Tranche Three Share-based Payment Arrangement, Tranche Three [Member] Share price (in dollars per share) Share Price Aggregate Intrinsic Value (in thousands) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value [Abstract] Business Acquisition [Axis] Business Acquisition [Axis] Expiration period Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period Statement [Line Items] Statement [Line Items] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] Class of Stock [Domain] Class of Stock [Domain] Number of consecutive trading days required for shares to vest Number of Consecutive Trading Days, Required for Shares to Vest Number of consecutive trading days required for shares to vest based on target price. Interest payable, current Interest Payable, Current Statement [Table] Statement [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Exchangeable Redeemable Preferred Stock Exchangeable Redeemable Preferred Stock [Member] Description of type or class of exchangeable redeemable preferred stock. Legal fees Legal Fees Credit Facility [Axis] Credit Facility [Axis] Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Class of warrant or right, exercise price of warrants or rights (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Entity Small Business Entity Small Business Lessee, Operating Lease, Liability, Payment, Due [Abstract] Lessee, Operating Lease, Liability, Payment, Due [Abstract] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Sale of stock, number of shares issued in transaction (in shares) Sale of Stock, Number of Shares Issued in Transaction Current Liabilities and Debt Obligations Debt Disclosure [Text Block] Net book value of assets contributed Net Book Value Of Assets Contributed Sum of the carrying amounts of net book value of assets on particular date. Prepaid expenses Prepaid Expense, Current Proceeds from issuance of common stock, net of issuance costs Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Accumulated amortization Capitalized Computer Software, Accumulated Amortization Amendment Flag Amendment Flag Time-and-materials Time-and-materials Contract [Member] Unrecognized tax benefits, income tax penalties and interest accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Number of shares authorized (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Leases Lessee, Finance Leases [Text Block] Federal Government Federal Government [Member] Federal Government Long-term line of credit Long-term Line of Credit Repayments of debt Repayments of Debt Credit Agreement Credit Agreement [Member] Refers to credit agreement. Cash (used in) provided by operating activities Net Cash Provided by (Used in) Operating Activities Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest [Abstract] Entity Central Index Key Entity Central Index Key Period of weighted average of share price of consecutive trading days equal to target price Weighted Average of Consecutive Trading Days, Required for Shares Equal to Target Price Period of weighted average share price for consecutive trading days equal to target price. Related Party [Domain] Related Party [Domain] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Capitalized software development costs Payments to Develop Software Preferred stock redemption costs Preferred Stock, Redemption Costs Preferred Stock, Redemption Costs Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Conversion of stock, amount converted Conversion of Stock, Amount Converted Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Income Statement Location [Axis] Income Statement Location [Axis] Accounts receivable, allowance for credit loss, current Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Income Statement Location [Domain] Income Statement Location [Domain] 2023 Lessee, Operating Lease, Liability, to be Paid, Year Two Treasury stock acquired, average cost per share (in dollars per share) Treasury Stock Acquired, Average Cost Per Share Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Selling, general and administrative expenses Selling, General and Administrative Expense Lease, Cost Lease, Cost [Table Text Block] 2024 Lessee, Operating Lease, Liability, to be Paid, Year Three Other assets Other Assets, Noncurrent Plan Name [Axis] Plan Name [Axis] Issuance of common stock Stock Issued During Period, Value, New Issues Accounts receivable, net of reserve of $122 and $308, respectively Receivables – net Receivables, Net, Current Cash flows from operating activities - finance leases Finance Lease, Interest Payment on Liability Total assets Assets Related Party Transactions Related Party Transactions Disclosure [Text Block] Interest expense Interest Expense, Debt General and Basis of Presentation Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Outstanding, beginning balance (in shares) Outstanding, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Title of 12(b) Security Title of 12(b) Security Contract with Customer, Basis of Pricing [Axis] Contract with Customer, Basis of Pricing [Axis] Finance Lease, Liability, Payment, Due [Abstract] Finance Lease, Liability, Payment, Due [Abstract] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Number of shares stock holder received (in shares) Conversion of Stock, Shares Issued Cash consideration received on sale of membership interest Cash Consideration Received On Sale Of Membership Interest Refers to cash consideration received on sale of membership interest. Antidilutive Securities [Axis] Antidilutive Securities [Axis] Cost of sales - services Cost of Sales [Member] Additional percentage of ownership interest Additional Percentage of Ownership Acquired Refers to additional percentage of ownership acquired in a business combination. Finance Lease, Liability, Fiscal Year Maturity Finance Lease, Liability, Fiscal Year Maturity [Table Text Block] Vesting [Domain] Vesting [Domain] Interest payable Interest Payable Interest expense Interest Expense Depreciation and amortization Depreciation, Depletion and Amortization Preferred stock, liquidation preference (in dollars per share) Preferred Stock, Liquidation Preference Per Share Noncontrolling interest, ownership percentage by noncontrolling owners Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners Product and Service [Axis] Product and Service [Axis] Total liabilities Liabilities Share-based payment arrangement, nonvested award, cost not yet recognized, period for recognition Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Expected volatility rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Less imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Prepayment price percentage for January 26, 2020 to October 14, 2020 Prepayment Price Percentage Two Prepayment price percentage of the principal amount for the specific period. Contract with customer, liability, revenue recognized Contract with Customer, Liability, Revenue Recognized Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Hamot Hamot [Member] Refers to the plaintiff in the case against the Company. Number of consecutive quarters Number of Consecutive Quarters Refers to consecutive quarters in the credit agreement. Preferred Units by Name [Axis] Preferred Units by Name [Axis] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Number of employees hired Number Of Employees Hired Number Of Employees Hired Liquidation value amount as per cash transaction in condition 2 ERPS Conversion Amount into Right to Receive Cash in Condition Two ERPS Conversion amount holder will into the right to receive in cash transaction under condition two. Changes in other operating assets and liabilities Increase (Decrease) in Other Operating Assets and Liabilities, Net Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding Number of quarterly maturity date extensions Number of quarterly maturity date extensions Refers to the number of quarterly maturity date extensions. Additional Paid-in Capital Additional Paid-in Capital [Member] Inventory, gross Inventory, Gross Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Number of shares held by related party (in shares) Number Of Shares Held By Related Party Total number of share held by related party. Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Class of Stock [Line Items] Class of Stock [Line Items] Stockholders' equity note, stock split, conversion ratio Stockholders' Equity Note, Stock Split, Conversion Ratio Adjustments to reconcile net (loss) income to cash (used in) provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Billed accounts receivable Accounts Receivable, before Allowance for Credit Loss, Current Interest on lease liabilities Finance Lease, Interest Expense Litigation Case [Axis] Litigation Case [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Amount of increase in exit fee payable Amount of Increase (Decrease) in Exit Fee Payable Refers to the amount of increase (decrease) in exit fee payable. Credit agreement transaction costs Debt Instrument Transaction Costs Amount of debt incurred fee and issuance costs related to the issuance of the credit agreement. (Loss) income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Research and development Research and Development Expense IPO IPO [Member] Subsequent Event Subsequent Event [Member] Other Comprehensive Income (Loss) Comprehensive Income, Policy [Policy Text Block] Number of members in board of director Number Of Members In Board Of Director Total number of members in board of director team. Common stock, shares authorized (in shares) Common Stock, Shares Authorized Liquidation value in cash transaction in condition 1 ERPS Conversion Amount into Right to Receive Cash in Condition One ERPS Conversion amount holder will into the right to receive in cash transaction under condition one. Goodwill Goodwill and Intangible Assets, Goodwill, Policy [Policy Text Block] Income Statement [Abstract] Income Statement [Abstract] Accumulated Other Comprehensive Income AOCI Attributable to Parent [Member] Award requisite service period Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period Conversion of stock, amount issued Conversion of Stock, Amount Issued Repayments of senior debt Repayments of Senior Debt Operating lease liabilities – long-term Total, net of short-term portion Operating Lease, Liability, Noncurrent Amendment fee paid to lender Payments of Debt Restructuring Costs Current assets Assets, Current [Abstract] Sale of stock, number of shares issued by certain existing shareholders (in shares) Sale Of Stock, Number Of Shares Issued By Certain Existing Shareholders Sale Of Stock, Number Of Shares Issued By Certain Existing Shareholders Software Development Costs Software and Software Development Costs [Member] Comprehensive (loss) income attributable to Telos Corporation Comprehensive Income (Loss), Net of Tax, Attributable to Parent 2024 Finance Lease, Liability, to be Paid, Year Three Preferred stock par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment City Area Code City Area Code Cash paid for amounts included in the measurement of lease liabilities: Cash Flow, Operating Activities, Lessee [Abstract] Document Period End Date Document Period End Date Interest expense, related party Interest Expense, Related Party Emmett J. Wood Emmett Wood [Member] A person serving as an employee since 1996 and relative (brother) of Chairman and CEO. Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Class A Membership Unit Class A Membership Unit [Member] Class A membership unit. Revenue, remaining performance obligation, percentage Revenue, Remaining Performance Obligation, Percentage Shares reserved for future issuance (in shares) Common Stock, Capital Shares Reserved for Future Issuance Sale of stock, percentage of ownership before transaction Sale of Stock, Percentage of Ownership before Transaction Preferred stock, redemption price per share (in dollars per share) Preferred Stock, Redemption Price Per Share Net (loss) income Net (loss) income Net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Cost plus fixed fee Cost Plus Fixed Fee [Member] Contract with customer in which amount of consideration is based on cost plus fixed fee. Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Repurchase of common stock Stock Repurchased During Period, Value Stock-based compensation Share-based Payment Arrangement, Noncash Expense Finance lease cost Finance Lease Costs [Abstract] Cover [Abstract] Cover [Abstract] Redemption of public preferred stock (in shares) Number Of Redeemable Preferred Stock Redeemed Total number of redeemable public preferred share redeemed during the period. Property, plant and equipment, useful life Property, Plant and Equipment, Useful Life Leases Lessee, Operating Leases [Text Block] Amendment fee and out-of-pocket costs and expenses Amendment Fee and Out-of-pocket Costs and Expenses Refers to the amount of amendment fee and out-of-pocket costs and expenses in consideration to the amendment. Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Total costs and expenses Cost of Goods and Services Sold Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Liquidation value in issuance of shares common stock in condition 1 ERPS Conversion Amount into Right to Receive Shares in Condition One ERPS Conversion amount holder will into the right to receive in shares transaction under condition one. Equity Components [Axis] Equity Components [Axis] Share-based Payment Arrangement [Abstract] Share-based Payment Arrangement [Abstract] Minimum Minimum [Member] Operating lease obligations – short-term Short-term portion Operating Lease, Liability, Current Number of shares held by chief executive officer (in shares) Number of Shares Held by Chief Executive Officer Total number of share held by Chief executive officer of the company. Less: Net income attributable to non-controlling interest Net income Net Income (Loss) Attributable to Noncontrolling Interest Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Entity Interactive Data Current Entity Interactive Data Current Revenue Revenues [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Stock-Based Compensation Share-based Payment Arrangement [Policy Text Block] Customer [Domain] Customer [Domain] Weighted- Average Contractual Life (years) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract] Additional paid-in capital Additional Paid in Capital, Common Stock Litigation settlement, amount awarded to other party Litigation Settlement, Amount Awarded to Other Party Entity Registrant Name Entity Registrant Name Subsequent Event Type [Domain] Subsequent Event Type [Domain] Cumulative foreign currency translation loss Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating lease, weighted average discount rate, percent Operating Lease, Weighted Average Discount Rate, Percent Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items] Debt instrument, fee amount Debt Instrument, Fee Amount Accrued compensation and benefits Deferred Compensation Liability, Current Preferred stock dividends (in shares) Preferred Stock Dividends, Shares Number of reportable segments Number of Reportable Segments Less imputed interest Finance Lease, Liability, Undiscounted Excess Amount Debt instrument, interest rate, effective percentage Debt Instrument, Interest Rate, Effective Percentage Research and development Research and Development Expense [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Goodwill impairment Goodwill, Impairment Loss Cumulative actuarial gain on pension liability adjustment Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Total lease payments Lessee, Operating Lease, Liability, to be Paid Noncontrolling interest, ownership percentage by parent Related party ownership percentage Noncontrolling Interest, Ownership Percentage by Parent Noncontrolling Interest [Abstract] Sale of Stock [Axis] Sale of Stock [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Service-Based RSU Awards Service Based RSU Awards [Member] Stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time are met including service based. Goodwill Goodwill Document Transition Report Document Transition Report Title of Individual [Axis] Title of Individual [Axis] Conversion per share amount (in dollars per share) Preferred Stock, Conversion Price The price per share of the conversion feature in the preferred stock. Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Common stock warrants Warrant [Member] Other income (expense) Nonoperating Income (Expense) [Abstract] Other current assets Other Assets, Current Document Quarterly Report Document Quarterly Report Vesting [Axis] Vesting [Axis] General and administrative General and Administrative Expense [Member] Issuance of common stock on APIC Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Preferred Units, Class [Domain] Preferred Units, Class [Domain] Secondary Public Offering Secondary Public Offering [Member] Sale of stock by a private company to the public. Noncash: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Contract liabilities Contract with customer liability, current Contract with Customer, Liability, Current After 2025 Finance Lease, Liability, To Be Paid, After Year Four Finance Lease, Liability, To Be Paid, After Year Four Accounts payable, trade, current Accounts Payable, Trade, Current Credit Facility [Domain] Credit Facility [Domain] Weighted-average shares of common stock outstanding, diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted Litigation Case [Domain] Litigation Case [Domain] Net (loss) income per share attributable to Telos Corporation, basic (in dollars per share) Earnings Per Share, Basic Unrecognized tax benefits that would impact effective tax rate Unrecognized Tax Benefits that Would Impact Effective Tax Rate 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. Expected term Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term Entity File Number Entity File Number Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Debt Disclosure [Abstract] Debt Disclosure [Abstract] Operating lease, weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Sales and marketing Selling and Marketing Expense Line of credit facility, increase (decrease), net Line of Credit Facility, Increase (Decrease), Net Cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Litigation settlement, amount awarded from other party Litigation Settlement, Amount Awarded from Other Party Revenue, remaining performance obligation, amount Revenue, Remaining Performance Obligation, Amount Inventory valuation reserves Inventory Valuation Reserves Share-based payment arrangement, expense Share-based Payment Arrangement, Expense Prepayment price percentage for January 26, 2019 to January 25, 2020 Prepayment Price Percentage One Prepayment price percentage of the principal amount for the period. Unrecognized tax benefits Unrecognized Tax Benefits Common stock, $0.001 par value, 250,000,000 shares authorized, 66,755,230 shares and 64,625,071 shares issued and outstanding as of June 30, 2021 and December 31, 2020, respectively Common Stock, Value, Issued Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Document Fiscal Year Focus Document Fiscal Year Focus After 2025 Lessee, Operating Lease, Liability, To Be Paid, After Year Four Lessee, Operating Lease, Liability, To Be Paid, After Year Four Sale of warrants, price per share (in dollars per share) Warrants Acquired, Average Cost Per Share Warrants Acquired, Average Cost Per Share 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. Entity Current Reporting Status Entity Current Reporting Status 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. Sale of stock, price per share (in dollars per share) Sale of Stock, Price Per Share 2025 Finance Lease, Liability, to be Paid, Year Four Capitalized computer software, amortization Capitalized Computer Software, Amortization Net Income (Loss) per Share Earnings Per Share, Policy [Policy Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Preferred stock dividend rate per annum (in dollars per share) Preferred Stock, Dividend Rate, Per-Dollar-Amount Share price (in dollars per share) Business Acquisition, Share Price Award vesting rights, percentage Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage Repurchase of outstanding warrants Warrants Repurchased During Period, Value Warrants Repurchased During Period, Value Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Common stock, shares issued (in shares) Common Stock, Shares, Issued Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Redeemable Preferred Stock Redeemable Preferred Stock [Text Block] The entire disclosure for redeemable preferred stock describing the type of equity share that is liable to be bought back by the issuing company on a specified date or after a specified period of notice. Corporate legislation in some jurisdictions prohibits the redemption if it jeopardizes the financial health of the issuer the type of equity share that is liable to be bought back by the issuing company on a specified date or after a specified period of notice. Corporate legislation in some jurisdictions prohibits the redemption if it jeopardizes the financial health of the issuer. Total Operating Lease, Liability Deferred tax liabilities, net Deferred Tax Liabilities, Net Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Subsidiary or Equity Method Investee, Sale of Stock by Subsidiary or Equity Investee [Table] Capitalized software development costs Capitalized Computer Software, Net Increase in interest rate Debt Instrument, Interest Rate, Increase (Decrease) Contract with Customer, Basis of Pricing [Domain] Contract with Customer, Basis of Pricing [Domain] Debt Instrument [Line Items] Debt Instrument [Line Items] Public Preferred Stock Twelve Percent Cumulative Exchangeable Redeemable Preferred Stock [Member] Description of type or class of redeemable preferred stock. For instance, cumulative preferred stock, noncumulative preferred stock, convertible or series. Total consideration transferred Business Combination, Consideration Transferred Total liabilities and stockholders’ equity Liabilities and Equity Number of shares issued in acquisition (in shares) Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Accumulated other comprehensive income Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Income Taxes Income Tax Disclosure [Text Block] Entity Address, City or Town Entity Address, City or Town Number of directors entitled to appoint Number Of Directors Entitled To Appoint Total number of directors entitled to appoint during the reporting period. Firm fixed-price Fixed-price Contract [Member] Operating lease cost Operating Lease, Cost General and administrative General and Administrative Expense Class B Membership Unit Class B Membership Unit [Member] Class B Membership Unit. Antidilutive securities excluded from computation of earnings per share, amount (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Finance lease, weighted average remaining lease term Finance Lease, Weighted Average Remaining Lease Term Other noncash items Other Noncash Income (Expense) Products Product [Member] Entity Ex Transition Period Entity Ex Transition Period Short-term lease cost Short-term Lease, Cost Loss on disposal of fixed assets Gain (Loss) on Disposition of Property Plant Equipment Equity Component [Domain] Equity Component [Domain] Executive Officer Executive Officer [Member] Property and equipment, including capitalized software development costs, net of accumulated depreciation and amortization of $38,867 and $36,891, respectively Property, Plant and Equipment, Net Entity Tax Identification Number Entity Tax Identification Number Revenue Recognition Revenue from Contract with Customer [Policy Text Block] Stock-Based Compensation Share-based Payment Arrangement [Text Block] Net (loss) income attributable to Telos Corporation Net Income (Loss) Attributable to Parent Total, net of short-term portion Finance Lease, Liability, Noncurrent Other current liabilities Other Liabilities, Current 2021 (excluding the six months ended June 30, 2021) Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year Distributions to Telos ID Class B member - non-controlling interest Payments to Noncontrolling Interests Leases [Abstract] Leases [Abstract] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Total current assets Assets, Current Current Fiscal Year End Date Current Fiscal Year End Date Goodwill Goodwill Disclosure [Text Block] Less:  Comprehensive income attributable to non-controlling interest Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Percentage of warrants issued of common equity interests Percentage Of Warrants Issued Of Common Equity Interests Refers to percentage of warrants issued of common equity interests of the entity on a fully diluted basis. Total Finance Lease, Liability Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Cash paid during the period for: Cash paid during the period for: [Abstract] Class of warrant or right, number of securities called by warrants or rights (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Document Fiscal Period Focus Document Fiscal Period Focus Long-term debt, percentage bearing fixed interest, percentage rate Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Subsidiary, Sale of Stock [Line Items] Subsidiary, Sale of Stock [Line Items] Supplemental disclosures of cash flow information: Supplemental Cash Flow Information [Abstract] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Enlightenment Capital Solutions Fund, II L.P. 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. Entity Filer Category Entity Filer Category Share-based Payment Arrangement, Expensed and Capitalized, Amount Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Common Stock Common Stock [Member] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Product and Service [Domain] Product and Service [Domain] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Finance lease, weighted average discount rate, percent Finance Lease, Weighted Average Discount Rate, Percent Total finance lease cost Finance Lease Cost Amount of lease cost on finance lease liability. Preferred stock dividend rate per annum Preferred Stock, Dividend Rate, Percentage Number of shares issued (in shares) Stock Issued During Period, Shares, New Issues Temporary Equity Disclosure [Abstract] Temporary Equity Disclosure [Abstract] Debt instrument, interest rate, stated percentage Debt Instrument, Interest Rate, Stated Percentage Revenue, remaining performance obligation, expected time of satisfaction, period Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Unvested restricted stock and restricted stock units Share-based Payment Arrangement [Member] Proceeds from (repayments of) related party debt Proceeds from (Repayments of) Related Party Debt Common Class A Common Class A [Member] Accumulated depreciation, depletion and amortization, property, plant and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Unbilled receivables Contract with Customer, Asset, after Allowance for Credit Loss, Current Porter Beneficial Owner [Member] Amount of increase in quarterly exit fee payable Amount of Increase (Decrease) in Quarterly Exit Fee Payable Refers to the amount of increase (decrease) in quarterly exit fee payable. Related Party Transactions [Abstract] Related Party Transactions [Abstract] Increase (decrease) in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Percentage of profit and loss allocated Percentage Of Profit And Loss Allocated Percentage of profit and loss allocated. Lessee, Operating Lease, Liability, Maturity Lessee, Operating Lease, Liability, Maturity [Table Text Block] Dividends on preferred stock Dividends, Preferred Stock Share-based Payment Arrangement, Option Share-based Payment Arrangement, Option [Member] Conversion of preferred stock to common stock Payments for Repurchase of Convertible Preferred Stock Weighted-average shares of common stock outstanding, basic (in dollars per share) Weighted Average Number of Shares Outstanding, Basic Risk free interest rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Ownership [Axis] Ownership [Axis] Foreign currency translation adjustments Foreign currency translation gain (loss) Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Term Loan Term Loan [Member] Loan from a bank for a specific amount that has a specified repayment schedule and a floating interest rate. Sale of Stock [Domain] Sale of Stock [Domain] Ownership [Domain] Ownership [Domain] Plan Name [Domain] Plan Name [Domain] Interest Interest Paid, Excluding Capitalized Interest, Operating Activities Total stockholders’ equity Beginning balance Ending balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Operating lease right-of-use assets obtained in exchange for lease obligations Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 2021 (excluding the three months ended March 31, 2021) Finance Lease, Liability, to be Paid, Remainder of Fiscal Year Net proceeds from initial public offering Proceeds from Issuance Initial Public Offering Class of Stock [Axis] Class of Stock [Axis] Inventories Inventory, Policy [Policy Text Block] (Provision for) benefit from income taxes Income tax provision (benefit) Income Tax Expense (Benefit) Non-Vested Restricted Stock Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Percentage of membership interest sold to investor Percentage Of Membership Interest Sold To Investor Total percentage of membership interest sold to investor. Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table] Sale of stock, percentage of ownership after transaction Sale of Stock, Percentage of Ownership after Transaction Accrued trade payables Accrued Liabilities, Current Title of Individual [Domain] Title of Individual [Domain] Net (loss) income per share attributable to Telos Corporation, diluted (in dollars per share) Earnings Per Share, Diluted Short-term portion Finance Lease, Liability, Current Unrecognized tax benefits that would not impact effective tax rate Unrecognized Tax Benefits That Would Not Impact Effective Tax Rate The total amount of unrecognized tax benefits that, if recognized, would not affect the effective tax rate. Local Phone Number Local Phone Number Cash payment for acquisition Payments to Acquire Businesses, Gross Adjusted accrued accretion of public preferred stock Public Preferred Stock Accretion Of Redemption Discount The amount of accretion of the preferred stock being adjusted during the period. Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Value of stock issued Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Share-based Payment Arrangement, Tranche One Share-based Payment Arrangement, Tranche One [Member] Noncontrolling Interest [Line Items] Noncontrolling Interest [Line Items] Dividends from preferred stock recorded as interest expense Dividends Preferred Stock As Interest Expense Preferred stock dividends charged to interest expense during the reporting period. Entity Address, Address Line One Entity Address, Address Line One Entity Emerging Growth Company Entity Emerging Growth Company Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Deferred income tax provision Deferred Income Tax Expense (Benefit) Warrants repurchased during period (in shares) Warrant Repurchased During Period, Shares Warrant Repurchased During Period, Shares Award Type [Axis] Award Type [Axis] Weighted- Average Grant Date Fair Value (per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Maximum Maximum [Member] Amortization of debt issuance costs Amortization of Debt Issuance Costs Preferred stock authorized (in shares) Preferred Stock, Shares Authorized Non-Controlling Interest Noncontrolling Interest [Member] Percentage of redeemable preferred stock held by related party after redemption Percentage Of Redeemable Preferred Stock Held By Related Party After Redemption Percentage of redeemable preferred stock held by related party after redemption. Accumulated Deficit Retained Earnings [Member] Cash used in investing activities Net Cash Provided by (Used in) Investing Activities Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Revenue, Performance Obligation [Abstract] Revenue, Performance Obligation [Abstract] Award Type [Domain] Award Type [Domain] Accounts payable and other accrued liabilities Accounts Payable and Other Accrued Liabilities, Current Trading Symbol Trading Symbol Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms Working capital Working capital A measure of both a entity's efficiency and its short-term financial health. Liquidation value in issuance of shares common stock in condition 2 ERPS Conversion Amount into Right to Receive Shares in Condition Two ERPS Conversion amount holder will into the right to receive in shares transaction under condition two. Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Current liabilities Liabilities, Current [Abstract] Telos ID, Teloworks and Telos APAC Telos ID, Teloworks And Telos APAC [Member] Telos ID, Teloworks And Telos APAC Entity Shell Company Entity Shell Company 2023 Finance Lease, Liability, to be Paid, Year Two Segment Reporting Segment Reporting, Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract]