Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Deferred income taxes (Note 9)	$ 741,000	$ 3,391,000
Decrease in deferred tax liabilities	(3,000,000)
Operating loss carryforwards	11,700,000
Alternate minimum tax credit carryforwards	60,000
Current provision [Abstract]
Federal	(86,000)	114,000	$ (902,000)
State	29,000	28,000	54,000
Total current	(57,000)	142,000	(848,000)
Deferred provision (benefit) [Abstract]
Federal	(2,622,000)	155,000	4,333,000
State	(88,000)	37,000	780,000
Total deferred	(2,710,000)	192,000	5,113,000
Total provision	$ (2,767,000)	$ 334,000	$ 4,265,000
Reconciliation of effective tax rate [Abstract]
Computed expected income tax provision	34.00%	34.00%	34.00%
State income taxes, net of federal income tax benefit	0.90%	0.80%	2.10%
Change in valuation allowance for deferred tax assets, exclusive of impact of Tax Act	(26.90%)	(21.50%)	(61.30%)
Cumulative deferred adjustments	0.00%	(0.30%)	(0.10%)
Provision to return adjustments	0.00%	(0.40%)	1.30%
Other permanent differences	(1.30%)	(1.80%)	(1.10%)
Dividend and accretion on preferred stock	(15.20%)	(19.30%)	(11.30%)
FIN 48 liability	(0.90%)	0.70%	(0.80%)
R&D credit	4.60%	3.30%	1.60%
Impact of Tax Act	35.50%	0.00%	0.00%
Other	1.50%	(0.40%)	(0.90%)
Effective income tax rate	32.20%	(4.90%)	(36.50%)
Deferred tax assets [Abstract]
Accounts receivable, principally due to allowance for doubtful accounts	$ 108,000	$ 161,000
Allowance for inventory obsolescence and amortization	818,000	778,000
Accrued liabilities not currently deductible	1,657,000	2,234,000
Accrued compensation	735,000	1,006,000
Deferred rent	5,134,000	7,682,000
Telos ID basis difference	65,000	0
Net operating loss carryforwards - federal	2,453,000	1,301,000
Net operating loss carryforwards - state	848,000	405,000
Federal tax credit	666,000	533,000
Total gross deferred tax assets	12,484,000	14,100,000
Less valuation allowance	(7,219,000)	(10,499,000)
Total deferred tax assets, net of valuation allowance	5,265,000	3,601,000
Deferred tax liabilities [Abstract]
Amortization and depreciation	(2,127,000)	(2,696,000)
Unbilled accounts receivable, deferred for tax purposes	(1,282,000)	(787,000)
Goodwill basis adjustment and amortization	(2,597,000)	(3,451,000)
Telos ID basis difference	0	(58,000)
Total deferred tax liabilities	(6,006,000)	(6,992,000)
Net deferred tax liabilities	(741,000)	(3,391,000)
Unrecognized tax benefits [Roll Forward]
Unrecognized tax benefits, beginning of period	762,000	803,000	$ 708,000
Gross increases-tax positions in prior period			92,000
Gross decreases-tax positions in prior period	(127,000)	(66,000)
Gross increases-tax positions in current period	77,000	46,000	38,000
Settlements	(35,000)	(21,000)	(35,000)
Unrecognized tax benefits, end of period	677,000	762,000	803,000
Interest and penalties	266,000	233,000
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance Beginning of Period	10,499,000	9,027,000	1,868,000
Additions	0	1,472,000	7,159,000
Deductions	(3,280,000)	0	0
Balance End of Period	$ 7,219,000	$ 10,499,000	$ 9,027,000