Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Information [Line Items]
Net sales by Geographic Area	$ 46,713	$ 37,175	$ 91,475	$ 73,360
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	$ 38,695	$ 32,155	$ 74,196	$ 57,731
Percentage of Net sales by Geographic Area	82.80%	86.50%	81.10%	78.70%
Other Countries
Segment Reporting Information [Line Items]
Net sales by Geographic Area	$ 8,018	$ 5,020	$ 17,279	$ 15,629
Percentage of Net sales by Geographic Area	17.20%	13.50%	18.90%	21.30%