Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 58,756	$ 46,713	$ 114,286	$ 91,475
Percentage of net sales by geographic area	100.00%	100.00%	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 52,219	$ 38,695	$ 94,687	$ 74,196
Percentage of net sales by geographic area	88.90%	82.80%	82.90%	81.10%
Other Countries
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 6,537	$ 8,018	$ 19,599	$ 17,279
Percentage of net sales by geographic area	11.10%	17.20%	17.10%	18.90%