Other Current Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Current Assets Disclosure [Abstract]
Prepaid Expense, Current	$ 10,718	$ 8,290
Sales taxes receivable from customers	30	120
Due from prior owners of acquired businesses re: working capital settlements	945	1,021
Research and development tax credits receivable	383	898
Income Taxes Receivable, Current	347	0
Other Receivables	409	613
Other current assets	$ 12,832	$ 10,942