Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts receivable	$ 1,267	$ 887
Provision for sales returns	$ 727	$ 1,651
Class 1 common stock [Member]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	233,333,333	233,333,333
Common stock, shares issued	0	0
Common stock, shares outstanding	0	0
Class 2 common stock [Member]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	179,118,980	158,486,087
Common stock, shares outstanding	179,118,980	158,486,087