Organization and Summary of Significant Accounting Policies - Net Sales by Geographic Area (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Net sales by Geographic Area	$ 137,831	$ 114,753	$ 90,028
Percentage of Net sales by Geographic Area	100.00%	100.00%	100.00%
United States [Member]
Segment Reporting Information [Line Items]
Net sales by Geographic Area	115,674	93,427	72,261
Percentage of Net sales by Geographic Area	84.00%	81.00%	80.00%
Other Countries [Member]
Segment Reporting Information [Line Items]
Net sales by Geographic Area	$ 22,157	$ 21,326	$ 17,767
Percentage of Net sales by Geographic Area	16.00%	19.00%	20.00%