Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Net sales by Geographic Area	$ 36,185	$ 30,434
Total Net Sales [Member]
Segment Reporting Information [Line Items]
Net sales by Geographic Area	36,185	30,434
Percentage of Net sales by Geographic Area	100.00%	100.00%
United States [Member] | Total Net Sales [Member]
Segment Reporting Information [Line Items]
Net sales by Geographic Area	25,576	27,314
Percentage of Net sales by Geographic Area	71.00%	90.00%
Other Countries [Member] | Total Net Sales [Member]
Segment Reporting Information [Line Items]
Net sales by Geographic Area	$ 10,609	$ 3,120
Percentage of Net sales by Geographic Area	29.00%	10.00%