Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Apr. 01, 2016	Dec. 31, 2015	Apr. 03, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Accrued compensation and benefits	$ 7,741	$ 7,357
Accrued warranty	3,248	3,335	$ 2,825	$ 3,044
Accrued restructuring	2,383	1,652
Accrued contingent considerations	2,901
Accrued professional services fees and other	8,001	8,838
Total	$ 24,274	$ 21,182