Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 79,242	$ 55,530
Percentage of net sales by geographic area	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 64,752	$ 42,468
Percentage of net sales by geographic area	81.70%	76.50%
Other Countries
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 14,490	$ 13,062
Percentage of net sales by geographic area	18.30%	23.50%