Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Total stock-based compensation	$ 3,526	$ 4,035	$ 3,251
Cost of goods sold — direct
Total stock-based compensation	179	181	154
Sales and marketing
Total stock-based compensation	217	336	167
Technology
Total stock-based compensation	646	751	352
General and administrative
Total stock-based compensation	$ 2,484	$ 2,767	$ 2,578