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Consolidated Statements of Operations (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Total stock-based compensation $ 14,356 $ 4,077 $ 4,891
Cost of goods sold — retail      
Total stock-based compensation 201 183 266
Sales and marketing      
Total stock-based compensation 1,728 415 249
Technology      
Total stock-based compensation 2,066 649 777
General and administrative      
Total stock-based compensation $ 10,361 $ 2,830 $ 3,599