Consolidated Statements of Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total stock-based compensation	$ 4,891	$ 3,526	$ 4,035
Cost of goods sold — direct
Total stock-based compensation	266	179	181
Sales and marketing
Total stock-based compensation	249	217	336
Technology
Total stock-based compensation	777	646	751
General and administrative
Total stock-based compensation	$ 3,599	$ 2,484	$ 2,767