Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current provision [Abstract]
Federal	$ (29,000)	$ (86,000)	$ 114,000
State	(17,000)	29,000	28,000
Total current	(46,000)	(57,000)	142,000
Deferred provision (benefit) [Abstract]
Federal	15,000	(2,622,000)	155,000
State	62,000	(88,000)	37,000
Total deferred	77,000	(2,710,000)	192,000
Total provision (benefit)	$ 31,000	$ (2,767,000)	$ 334,000
Reconciliation of effective tax rate [Abstract]
U.S. federal corporate tax rate	21.00%	34.00%	34.00%
State income taxes, net of federal income tax benefit	(20.90%)	0.90%	0.80%
Change in valuation allowance for deferred tax assets, exclusive of impact of Tax Act	47.70%	(26.90%)	(21.50%)
Cumulative deferred adjustments	0.00%	0.00%	(0.30%)
Provision to return adjustments	1.80%	0.00%	(0.40%)
Other permanent differences	(12.20%)	(1.30%)	(1.80%)
Dividend and accretion on preferred stock	(49.90%)	(15.20%)	(19.30%)
FIN 48 liability	(4.60%)	(0.90%)	0.70%
R&D credit	27.70%	4.60%	3.30%
Impact of Tax Act	(12.50%)	35.50%	0.00%
Other	0.00%	1.50%	(0.40%)
Effective income tax rate	(1.90%)	32.20%	(4.90%)
Deferred tax assets [Abstract]
Accounts receivable, principally due to allowance for doubtful accounts	$ 79,000	$ 108,000
Allowance for inventory obsolescence and amortization	281,000	818,000
Accrued liabilities not currently deductible	1,634,000	1,657,000
Accrued compensation	1,206,000	735,000
Deferred rent	4,750,000	5,134,000
Telos ID basis difference	0	65,000
Section 163(j) interest limitation	246,000	0
Net operating loss carryforwards - federal	1,956,000	2,453,000
Net operating loss carryforwards - state	653,000	848,000
Federal tax credit	983,000	666,000
Total gross deferred tax assets	11,788,000	12,484,000
Less valuation allowance	(6,652,000)	(7,219,000)
Total deferred tax assets, net of valuation allowance	5,136,000	5,265,000
Deferred tax liabilities [Abstract]
Amortization and depreciation	(2,237,000)	(2,127,000)
Unbilled accounts receivable, deferred for tax purposes	(955,000)	(1,282,000)
Goodwill basis adjustment and amortization	(2,713,000)	(2,597,000)
Telos ID basis difference	(49,000)	0
Total deferred tax liabilities	(5,954,000)	(6,006,000)
Net deferred tax liabilities	(818,000)	(741,000)
Movement in Valuation Allowances and Reserves [Roll Forward]
Decrease in deferred tax liabilities	(3,000,000)
Operating loss carryforwards	9,300,000
Alternate minimum tax credit carryforwards	60,000
Unrecognized tax benefits [Roll Forward]
Unrecognized tax benefits, beginning of period	677,000	762,000	$ 803,000
Gross decreases-tax positions in prior period	(63,000)	(127,000)	(66,000)
Gross increases-tax positions in current period	92,000	77,000	46,000
Settlements	(58,000)	(35,000)	(21,000)
Unrecognized tax benefits, end of period	648,000	677,000	762,000
Interest and penalties	278,000	266,000
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance Beginning of Period	7,219,000	10,499,000	9,027,000
Additions	0	0	1,472,000
Deductions	(567,000)	(3,280,000)	0
Balance End of Period	$ 6,652,000	$ 7,219,000	$ 10,499,000