Consolidated Statements of Income and Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Total stock-based compensation	$ 998	$ 809	$ 2,949	$ 2,377
Cost of goods sold — direct
Total stock-based compensation	45	37	130	117
Sales and marketing
Total stock-based compensation	77	44	255	123
Technology
Total stock-based compensation	183	33	550	235
General and administrative
Total stock-based compensation	$ 693	$ 695	$ 2,014	$ 1,902