Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2020	Dec. 31, 2019
Redeemable convertible preferred stock, par value	$ 0.006	$ 0.006
Redeemable convertible preferred stock, shares authorized	0	130,000,000
Redeemable convertible preferred stock, shares issued	0	126,046,000
Redeemable convertible preferred stock, shares outstanding	0	126,046,000
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	50,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common Stock
Common stock, par value	$ 0.002	$ 0.002
Common stock, shares authorized	0	380,000,000
Common stock, shares issued	0	229,750,000
Common stock, shares outstanding	0	229,750,000
Common Class A
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	2,000,000,000	0
Common stock, shares issued	63,071,000	0
Common stock, shares outstanding	63,071,000	0
Common Class B
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	1,000,000,000	0
Common stock, shares issued	328,589,000	0
Common stock, shares outstanding	328,589,000	0