General and Basis of Presentation (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019 USD ($) shares	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) Segment Reportingunit shares	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segment			1
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Right-of-use assets	$ 1,727,000		$ 1,727,000		$ 0
Lease liabilities	1,926,000		1,926,000
Disaggregation of Revenue [Abstract]
Revenue	36,048,000	$ 34,943,000	67,214,000	$ 67,344,000
Components of Accounts Receivable [Abstract]
Billed accounts receivable	10,677,000		10,677,000		18,848,000
Unbilled receivables	17,246,000		17,246,000		16,000,000
Allowance for doubtful accounts	(306,000)		(306,000)		(306,000)
Receivables - net	27,617,000		27,617,000		34,542,000
Components of Contract Liabilities [Abstract]
Contract liabilities	4,363,000		4,363,000		5,232,000
Revenue, Performance Obligation [Abstract]
Remaining performance obligation	74,100,000		74,100,000
Revenue recognized included in opening contract liabilities	1,200,000	1,500,000	$ 3,100,000	4,100,000
Accounts Receivable [Abstract]
Percentage of initial payment by factor of U.S. Federal government receivables			90.00%
Percentage of initial payment by factor of commercial prime contractors			85.00%
Maximum limit of sold receivables			$ 10,000,000
Sold receivables during the period	4,400,000	2,000,000	9,400,000	5,100,000
Loss recognized in selling, general and administrative expenses	15,000	7,000	32,000	18,000
Balance of sold receivables			1,400,000	1,000,000	900,000
Deferred price related to sold receivables			200,000	100,000	100,000
Inventories [Abstract]
Gross inventory	5,400,000		5,400,000		4,900,000
Inventory obsolescence reserves	520,000		520,000		520,000
Software Development Costs [Abstract]
Capitalized software development costs	4,400,000		$ 4,400,000		3,100,000
Software development estimated useful life			2 years
Amortization expense	500,000	200,000	$ 900,000	400,000
Accumulated amortization	2,200,000		$ 2,200,000		1,300,000
Goodwill [Abstract]
Number of reporting units | Reportingunit			3
Goodwill amortization period for income tax purposes			15 years
Accumulated Other Comprehensive Income [Abstract]
Cumulative foreign currency translation loss	(88,000)		$ (88,000)		(90,000)
Cumulative actuarial gain on pension liability adjustment	107,000		107,000		107,000
Accumulated other comprehensive income	19,000		19,000		17,000
Firm Fixed-Price [Member]
Disaggregation of Revenue [Abstract]
Revenue	28,857,000	28,173,000	53,787,000	53,094,000
Time-and-Materials [Member]
Disaggregation of Revenue [Abstract]
Revenue	3,691,000	4,089,000	7,620,000	7,856,000
Cost Plus Fixed Fee [Member]
Disaggregation of Revenue [Abstract]
Revenue	$ 3,500,000	2,681,000	$ 5,807,000	6,394,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-07-01
Revenue, Performance Obligation [Abstract]
Remaining performance obligation percentage	85.40%		85.40%
Remaining performance obligation, expected timing of satisfaction, period	6 months		6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue, Performance Obligation [Abstract]
Remaining performance obligation percentage	14.20%		14.20%
Remaining performance obligation, expected timing of satisfaction, period
Federal [Member]
Disaggregation of Revenue [Abstract]
Revenue	$ 33,774,000	32,858,000	$ 62,757,000	62,569,000
State & Local, and Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue	$ 2,274,000	$ 2,085,000	$ 4,457,000	$ 4,775,000
Restricted Stock Grants [Member]
Restricted Stock Grants [Abstract]
Restricted stock remained subject to vesting (in shares) | shares	1,213,750		1,213,750
Restricted stock vested on date of grant			25.00%
Restricted stock vest on anniversary of the date of grant			25.00%
ASU 2016-02 [Member]
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Right-of-use assets					2,000,000
Lease liabilities					2,000,000
ASC 606 [Member]
Revenue from Contract with Customer [Abstract]
Revenue accruals for multiple contracts as a result of cumulative indirect rate adjustments					$ 6,000,000