General and Basis of Presentation (Details)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2017 shares	Sep. 30, 2018 USD ($) shares	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) Segment Unit shares	Sep. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | Segment				1
Disaggregation of Revenue [Abstract]
Revenue		$ 34,695,000	$ 28,243,000	$ 102,039,000	$ 72,450,000
Components of Accounts Receivable [Abstract]
Billed accounts receivable		10,485,000		10,485,000		$ 11,736,000
Unbilled receivables		16,077,000		16,077,000		13,195,000
Allowance for doubtful accounts		(300,000)		(300,000)		(411,000)
Receivables - net		26,262,000		26,262,000		24,520,000
Contract with Customer, Liability [Abstract]
Contract liabilities		4,464,000		4,464,000		10,073,000
Revenue, Performance Obligation [Abstract]
Remaining performance obligation		91,100,000		$ 91,100,000
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		6,000,000	13,900,000	11,100,000	22,100,000
Loss recognized in selling, general and administrative expenses		21,000	49,000	39,000	78,000
Balance of sold receivables				2,900,000		0
Deferred price related to sold receivables				400,000
Inventories [Abstract]
Gross inventory		9,700,000		9,700,000		15,000,000
Inventory valuation reserves		916,000		916,000		1,484,000
Software Development Costs [Abstract]
Capitalized software development costs		2,800,000		$ 2,800,000
Software development estimated useful life				2 years
Amortization expense		300,000	0	$ 700,000
Accumulated amortization		900,000		$ 900,000
Goodwill [Abstract]
Number of reporting units | Unit				3
Goodwill amortization period for income tax purposes				15 years
Accumulated Other Comprehensive Income [Abstract]
Cumulative foreign currency translation loss		(84,000)		$ (84,000)		(75,000)
Cumulative actuarial gain on pension liability adjustment		107,000		107,000		107,000
Accumulated other comprehensive income		23,000		23,000		32,000
ASC 606 [Member]
Revenue from Contract with Customer [Abstract]
Contract liabilities		(3,900,000)		(3,900,000)
Revenue accruals for multiple contracts as a result of cumulative indirect rate adjustments		5,600,000
Components of Accounts Receivable [Abstract]
Billed accounts receivable						11,736,000
Unbilled receivables						13,195,000
Allowance for doubtful accounts						(411,000)
Receivables - net						24,520,000
Contract with Customer, Liability [Abstract]
Contract liabilities						$ 10,073,000
Firm Fixed-Price [Member]
Disaggregation of Revenue [Abstract]
Revenue		21,154,000	24,314,000	74,249,000	59,782,000
Time-and-Materials [Member]
Disaggregation of Revenue [Abstract]
Revenue		4,404,000	2,336,000	12,260,000	7,466,000
Cost Plus Fixed Fee [Member]
Disaggregation of Revenue [Abstract]
Revenue		$ 9,137,000	1,593,000	$ 15,530,000	5,202,000
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-10-01
Revenue, Performance Obligation [Abstract]
Remaining performance obligation percentage		41.80%		41.80%
Remaining performance obligation, expected timing of satisfaction, period		3 months		3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-01-01
Revenue, Performance Obligation [Abstract]
Remaining performance obligation percentage		56.40%		56.40%
Remaining performance obligation, expected timing of satisfaction, period		1 year		1 year
Federal [Member]
Disaggregation of Revenue [Abstract]
Revenue		$ 32,784,000	26,358,000	$ 95,354,000	68,040,000
State & Local, and Commercial [Member]
Disaggregation of Revenue [Abstract]
Revenue		$ 1,911,000	$ 1,885,000	$ 6,685,000	$ 4,410,000
Restricted Stock Grants [Member]
Restricted Stock Grants [Abstract]
Restricted stock remained subject to vesting (in shares) | shares		2,457,500		2,457,500
Restricted stock vested on date of grant				25.00%
Restricted stock vest on anniversary of the date of grant				25.00%
Restricted Stock Grants [Member] | Executive Officers and Employees [Member]
Restricted Stock Grants [Abstract]
Restricted stock issued during the period (in shares) | shares	5,005,000