Consolidated Statements of Operations and Comprehensive Income (Loss) (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Total stock-based compensation	$ 3,527,000	$ 3,051,000	$ 5,056,000
Cost of goods sold-direct
Total stock-based compensation	272,000	193,000	212,000
Sales and marketing
Total stock-based compensation	318,000	377,000	608,000
Technology
Total stock-based compensation	799,000	628,000	1,071,000
General and administrative
Total stock-based compensation	$ 2,138,000	$ 1,853,000	$ 3,165,000