Contract Receivables

12 Months Ended

Dec. 31, 2015

Contract Receivables [Abstract]

Contract Receivables

5.  Contract Receivables

Contract receivables represent balances due from a broad base of both domestic and international customers. All contract receivables are considered to be collectible within twelve months. Recoverable costs and accrued profit not billed represent costs incurred and associated profit accrued on contracts that will become billable upon future milestones or completion of contracts.  The components of contract receivables are as follows:

(in thousands)	December 31,
	2015			2014
Billed receivables	$	9,831		$	10,792
Recoverable costs and accrued profit not billed		3,325			4,998
Allowance for doubtful accounts		(103	)		(22	)
Total contract receivables, net	$	13,053		$	15,768