Convertible Preferred Stock and Stockholders' Equity (Deficit) - Schedule of Convertible Preferred Stock (Details) - USD ($)	Mar. 31, 2021	Feb. 28, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Preferred authorized	170,000,000
Preferred shares issued	29,863,674
Preferred shares outstanding	29,863,674
Common shares issuable upon conversion	29,863,674		37,419,080
Preferred authorized			229,296,908
Preferred shares issued			53,509,351
Preferred shares outstanding			53,509,351
Carrying Value			$ 290,945,000
Liquidation Preference			$ 475,617,000
Series 1 Convertible Preferred Stock
Class Of Stock [Line Items]
Preferred authorized	60,000,000		57,324,227
Preferred shares issued	29,863,674		0
Preferred shares outstanding	29,863,674		0
Common shares issuable upon conversion	29,863,674	29,863,674
Preferred authorized			57,324,227
Series 2 Non-voting Convertible Preferred Stock
Class Of Stock [Line Items]
Preferred authorized	60,000,000
Preferred shares outstanding	0
Preferred authorized			57,324,227
Undesignated
Class Of Stock [Line Items]
Preferred authorized	50,000,000
Series C-1 Convertible Preferred Stock
Class Of Stock [Line Items]
Common shares issuable upon conversion			9,373,556
Preferred authorized			13,404,197
Preferred shares issued			13,404,197
Preferred shares outstanding			13,404,197
Carrying Value			$ 39,756,000
Liquidation Preference			$ 105,041,000
Series C-2 Convertible Preferred Stock
Class Of Stock [Line Items]
Preferred authorized			13,404,197
Series D-1 Convertible Preferred Stock
Class Of Stock [Line Items]
Common shares issuable upon conversion			1,005,013
Preferred authorized			11,809,630
Preferred shares issued			1,437,178
Preferred shares outstanding			1,437,178
Carrying Value			$ 3,561,000
Liquidation Preference			$ 5,631,000
Series D-2 Convertible Preferred Stock
Class Of Stock [Line Items]
Common shares issuable upon conversion			7,253,461
Preferred authorized			11,809,630
Preferred shares issued			10,372,452
Preferred shares outstanding			10,372,452
Carrying Value			$ 24,365,000
Liquidation Preference			$ 40,641,000
Series E-1 Convertible Preferred Stock
Class Of Stock [Line Items]
Common shares issuable upon conversion			1,601,316
Preferred authorized			13,477,088
Preferred shares issued			2,289,899
Preferred shares outstanding			2,289,899
Carrying Value			$ 16,943,000
Liquidation Preference			$ 24,319,000
Series E-2 Convertible Preferred Stock
Class Of Stock [Line Items]
Common shares issuable upon conversion			7,823,208
Preferred authorized			13,477,088
Preferred shares issued			11,187,189
Preferred shares outstanding			11,187,189
Carrying Value			$ 82,766,000
Liquidation Preference			$ 118,808,000
Series F-1 Convertible Preferred Stock
Class Of Stock [Line Items]
Common shares issuable upon conversion			3,398,514
Preferred authorized			18,633,312
Preferred shares issued			4,859,897
Preferred shares outstanding			4,859,897
Carrying Value			$ 38,496,000
Liquidation Preference			$ 59,420,000
Series F-2 Convertible Preferred Stock
Class Of Stock [Line Items]
Common shares issuable upon conversion			6,964,012
Preferred authorized			18,633,312
Preferred shares issued			9,958,539
Preferred shares outstanding			9,958,539
Carrying Value			$ 85,058,000
Liquidation Preference			$ 121,758,000