Revenue Recognition and Reserve for Sales Returns and Allowances - Additional Information (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Reserve for sales returns and allowances	$ 9,056	$ 16,424
Minimum
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Discount on invoiced amount of products	1.00%
Maximum
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Discount on invoiced amount of products	10.00%