CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Allowances	$ 5,889	$ 2,851
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	6,666,667,000	6,666,667,000
Common stock, shares issued (in shares)	398,929,000	360,850,000
Common stock, shares outstanding (in shares)	398,929,000	360,850,000
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock, shares authorized (in shares)	1,333,333,000	1,333,333,000
Common stock, shares issued (in shares)	182,911,000	209,054,000
Common stock, shares outstanding (in shares)	182,911,000	209,054,000