Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Payroll taxes	$ 2,369	$ 1,931
Payroll	4,971	4,086
Bonuses	5,283	7,301
Commissions	790	980
Vacation	7,748	6,753
Royalties	1,499	1,497
Value-added tax	1,797	1,555
Other accrued expenses	13,389	9,723
Total	$ 37,846	$ 33,826