Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jul. 01, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Accrued compensation and benefits	$ 14,288	$ 9,647
Accrued warranty	3,960	3,142	$ 3,179	$ 3,335
Accrued restructuring	782	1,371
Accrued professional services	1,366	1,237
Accrued contingent considerations	2,950	2,775
Customer deposits	2,297	1,164
Other	8,355	7,612
Total	$ 33,998	$ 26,948