Revenue and Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2015

Revenue and Accounts Receivable [Abstract]

Accounts Receivable Components

The components of accounts receivable are as follows (in thousands):

	December 31,
	2015			2014
Billed accounts receivable	$	15,340		$	15,447
Unbilled receivables		4,190			7,447
Allowance for doubtful accounts		(485	)		(372	)
	$	19,045		$	22,522

Allowance for Doubtful Accounts

The activities in the allowance for doubtful accounts are set forth below (in thousands):

	Balance Beginning of Year		Bad Debt Expenses (1)		Recoveries (2)		Balance End of Year
Year Ended December 31, 2015	$	372	$	113	$	--	$	485
Year Ended December 31, 2014	$	321	$	51	$	--	$	372
Year Ended December 31, 2013	$	319	$	2	$	--	$	321

(1)  Accounts receivable reserves and reversal of allowance for subsequent collections, net

(2)  Accounts receivable written-off and subsequent recoveries, net

Revenue by Customer Sector

We derived substantially all of our revenues from contracts and subcontracts with the U.S. Government. Revenue by customer sector for the last three fiscal years is as follows:

	2015				2014				2013
					(dollar amounts in thousands)
Federal	$	117,328	97.3	%	$	122,549	96.1	%	$	203,917	98.3	%
State & Local, and Commercial		3,306	2.7	%		5,013	3.9	%		3,477	1.7	%
Total	$	120,634	100.0	%	$	127,562	100.0	%	$	207,394	100.0	%