Accrued and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Royalties and other fulfillment costs	$ 2,592	$ 3,094
Employee compensation, commissions and benefits	5,955	5,958
Sales, VAT and other taxes payable	3,006	2,976
Other	5,557	5,292
Total accrued and other liabilities	$ 17,110	$ 17,320