Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Total stock-based compensation	$ 2,973	$ 1,045	$ 9,408	$ 1,985
Cost of goods sold — direct
Total stock-based compensation	41	39	111	88
Sales and marketing
Total stock-based compensation	315	113	1,188	209
Technology
Total stock-based compensation	621	150	1,142	310
General and administrative
Total stock-based compensation	$ 1,996	$ 743	$ 6,967	$ 1,378