Revenue and Accounts Receivable (Details) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Accounts Receivable [Line Items]
Concentration risk, percentage										100.00%	100.00%	100.00%
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
Sold receivables during the period										35,300
Loss recognized in selling, general and administrative expenses										200
Balance of sold receivables										1,000
Deferred price related to sold receivables										100
Components of Accounts Receivable [Abstract]
Billed accounts receivable													$ 13,164	$ 15,340
Unbilled receivables													6,352	4,190
Allowance for doubtful accounts		$ (429)			$ (485)	$ (485)			$ (372)	(429)	$ (485)	$ (321)	(429)	(485)
Accounts Receivable, Net, Total													$ 19,087	$ 19,045
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance Beginning of Year					485				372	485	372	321
Bad Debt Expenses	[1]									(56)	113	51
Deductions	[2]									0	0	0
Balance End of Year		429				485				429	485	372
Revenue by Customer Sector [Abstract]
Revenue		$ 26,052	$ 54,940	$ 26,798	$ 27,078	$ 26,925	$ 33,662	$ 32,028	$ 28,019	$ 134,868	$ 120,634	$ 127,562
Federal [Member]
Accounts Receivable [Line Items]
Concentration risk, percentage										96.70%	97.30%	96.10%
Revenue by Customer Sector [Abstract]
Revenue										$ 130,415	$ 117,328	$ 122,549
Federal [Member] | Revenue from Contracts and Subcontracts [Member]
Accounts Receivable [Line Items]
Concentration risk, percentage										96.70%	97.30%	96.10%
Federal [Member] | Accounts Receivable [Member]
Accounts Receivable [Line Items]
Concentration risk, percentage										98.00%
State & Local, and Commercial [Member]
Accounts Receivable [Line Items]
Concentration risk, percentage										3.30%	2.70%	3.90%
Revenue by Customer Sector [Abstract]
Revenue										$ 4,453	$ 3,306	$ 5,013

[1] Accounts receivable reserves and reversal of allowance for subsequent collections, net

[2] Accounts receivable written-off and subsequent recoveries, net