Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses	$ 8,290	$ 5,618
Sales taxes receivable from customers	120	121
Due from prior owners of acquired businesses for working capital settlements	1,021	938
Research and development tax credits receivable	898	1,152
Other	613	238
Total	$ 10,942	$ 8,067