Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 197,892	$ 164,525	$ 137,831
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	$ 161,803	$ 132,205	$ 115,674
Percentage of net sales by geographic area	81.80%	80.40%	83.90%
Other Countries
Segment Reporting Information [Line Items]
Net sales by geographic area	$ 36,089	$ 32,320	$ 22,157
Percentage of net sales by geographic area	18.20%	19.60%	16.10%