Unbilled Receivables (Tables)

6 Months Ended

Jul. 01, 2018

Contractors [Abstract]

Schedule of Unbilled Receivables

Unbilled receivables consisted of the following:

	July 1, 2018			December 31, 2017
Unbilled revenue	$	24,610		$	21,845
Advances and progress billings	(17,485		)	(16,605		)
Net unbilled receivables	$	7,125		$	5,240