Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Current Assets Disclosure [Abstract]
Prepaid Expense, Current	$ 8,527	$ 8,290
Sales taxes receivable from customers	89	120
Due from prior owners of acquired businesses re: working capital settlements	997	1,021
Research and development tax credits receivable	514	898
Payroll taxes overpayment receivable	640	0
Other Receivables	656	613
Other current assets	$ 11,423	$ 10,942