Balance Sheet Details - Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts payable and accrued liabilities
Accrued expenses	$ 42,355	$ 31,187
Accounts payable	9,121	6,792
Distributor commissions payable	8,836	8,502
Other taxes payable	7,789	6,386
Royalties payable	4,877	4,454
Others	4,607	3,665
Accounts payable and accrued liabilities	$ 77,585	$ 60,986