Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended			12 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Dec. 31, 2013	Jun. 30, 2013	Dec. 31, 2013
Statement of Operations Data:
Net (loss) income	$ (12,589)	$ 4,387	$ (20,535)		$ 9,516
Income tax (benefit) expense	19	78	(67)		759
Depreciation and amortization	2,369	1,206	4,649		2,368
Interest expense, net	7,859	6,069	15,543		12,063
Sciens fees and expenses	250	108	500		216
Transaction costs		416			416
Restructuring costs	(76)		(76)
M240 Program contract obligation expense	4,779		5,090			3,381
Business development costs	9	169	509		244
Severance costs	382		527	782
Other (income)/expense, net	(42)	(199)	(113)		(590)
Adjusted EBITDA	$ 2,960	$ 12,234	$ 6,027		$ 24,992