Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current provision [Abstract]
Federal	$ 0	$ 25	$ (29)
State	(77)	68	(17)
Total current	(77)	93	(46)
Deferred provision (benefit) [Abstract]
Federal	27	88	15
State	4	(285)	62
Total deferred	31	(197)	77
Total (benefit) provision	$ (46)	$ (104)	$ 31
Reconciliation of effective tax rate [Abstract]
Computed expected income tax provision	21.00%	21.00%	21.00%
State income taxes, net of federal income tax benefit	1.00%	(0.70%)	19.00%
Change in valuation allowance for deferred tax assets	17.00%	(24.70%)	(43.50%)
Cumulative deferred adjustments	0.70%	(1.10%)	0.00%
Provision to return adjustments	0.50%	1.30%	(1.70%)
Other permanent differences	1.00%	(3.80%)	6.10%
Dividend and accretion on preferred stock	10.50%	(35.80%)	45.40%
Gain on redemption of preferred stock	(43.30%)	(0.00%)	(0.00%)
Section 162(m) limitation - covered employees	14.60%	(6.90%)	5.10%
Capitalization of IPO transaction costs	4.40%	0.00%	0.00%
FIN 48 liability	0.20%	(3.70%)	4.20%
R&D credit	(12.40%)	19.00%	(25.20%)
Non-controlling interest	(15.90%)	40.00%	(40.10%)
Impact of Tax Act	0.000	0.000	0.114
Effective income tax rate	(0.70%)	4.60%	1.70%
Deferred tax assets [Abstract]
Accounts receivable, principally due to allowance for doubtful accounts	$ 78	$ 185
Allowance for inventory obsolescence and amortization	398	316
Accrued liabilities not currently deductible	2,204	1,649
Accrued compensation	1,161	1,655
Deferred rent	4,387	4,808
Section 163(j) interest limitation	306	804
Goodwill	41,534	0
Net operating loss carryforwards - federal	3,814	2,583
Net operating loss carryforwards - state	1,002	796
Federal tax credit	1,986	1,326
Total gross deferred tax assets	56,870	14,122
Less valuation allowance	(52,198)	(7,206)
Total deferred tax assets, net of valuation allowance	4,672	6,916
Deferred tax liabilities [Abstract]
Amortization and depreciation	(4,471)	(2,623)
Unbilled accounts receivable, deferred for tax purposes	(853)	(1,611)
Goodwill basis adjustment and amortization	0	(2,886)
Telos ID basis difference	0	(417)
Total deferred tax liabilities	(5,324)	(7,537)
Net deferred tax liabilities	$ (652)	(621)
Movement in Valuation Allowances and Reserves [Roll Forward]
Additional percentage of interest in partnership	50.00%
Deferred tax asset tax deductible goodwill	$ 44,900
Operating loss carryforwards	18,200
Operating loss carryforwards expire between 2035 and 2037	10,600
Research and development credit carryover	2,500
Unrecognized tax benefits that would impact effective tax rate	278	369	$ 369
Unrecognized tax benefits that would not impact effective tax rate	485	345	280
Unrecognized tax benefits [Roll Forward]
Unrecognized tax benefits, beginning of period	714	649	585
Decrease in prior year tax positions	(104)
Increase in prior year tax positions		1	3
Increase related to current year tax positions	213	101	92
Decrease related to lapse of statutes	(60)	(37)	(31)
Unrecognized tax benefits, end of period	763	714	649
Interest and penalties	241	304
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	7,206	6,652	7,219
Additions	44,992	554	0
Deductions	0	0	(567)
Balance End of Period	$ 52,198	$ 7,206	$ 6,652