Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Accrued compensation and benefits	$ 9,647	$ 7,357
Accrued warranty	3,142	3,335	$ 3,044	$ 3,315
Accrued restructuring	1,371	1,652
Accrued professional services	1,237	1,039
Accrued contingent considerations	2,775
Customer deposits	1,164	628
Other	7,612	7,171
Total	$ 26,948	$ 21,182