Other Assets and Liabilities - Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Accrued compensation	$ 3,291	$ 1,888
Accrued social charges	794	1,710
Customer allowances	7,981	5,710
Accrued contract research organization	1,764	0
Other	3,392	0
Total	$ 17,222	$ 9,308