Organization and Summary of Significant Accounting Policies (Details)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net sales by geographic area
Percentage of Net sales by Geographic Area	100.00%	100.00%
United States [Member]
Net sales by geographic area
Percentage of Net sales by Geographic Area	90.00%	84.00%
Other Countries [Member]
Net sales by geographic area
Percentage of Net sales by Geographic Area	10.00%	16.00%