Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 268,245	$ 197,892	$ 164,525
Percentage of net sales by geographic area	100.00%	100.00%	100.00%
United States
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 218,757	$ 161,803	$ 132,205
Percentage of net sales by geographic area	81.60%	81.80%	80.40%
Other Countries
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 49,488	$ 36,089	$ 32,320
Percentage of net sales by geographic area	18.40%	18.20%	19.60%