Convertible Preferred Stock - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		3 Months Ended		6 Months Ended
	Aug. 21, 2020	Mar. 31, 2020	Jan. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2020	Aug. 20, 2020	Dec. 31, 2019
Temporary Equity [Line Items]
Deemed dividend from exchange of convertible preferred stock						$ 9,050
Common Stock
Temporary Equity [Line Items]
Conversion of stock, shares issued and outstanding	50,439,595
Series B Convertible Preferred Stock
Temporary Equity [Line Items]
Convertible Preferred Stock, issued			1,182,265
Convertible Preferred Stock, par or stated value per share			$ 4.06
Proceeds from issuance of convertible preferred stock			$ 4,800			4,800
Stock issuance costs				$ 0		$ 0
Convertible Preferred Stock, authorized							16,009,845
Convertible Preferred Stock, outstanding		16,009,845		16,009,845	16,009,845	16,009,845		14,827,580
Series C Convertible Preferred Stock
Temporary Equity [Line Items]
Convertible Preferred Stock, issued		15,527,943			15,527,943
Proceeds from issuance of convertible preferred stock						$ 88,181
Stock issuance costs				$ 320		320
Shares issued upon exchange of Series A convertible preferred stock		1,988,802			1,988,802
Deemed dividend from exchange of convertible preferred stock					$ 9,100	$ 9,100
Reduction of additional paid-in-capital related to temporary equity deemed dividend					2,300
Increase in accumulated deficit related to temporary equity deemed dividend					$ 6,700
Convertible Preferred Stock, authorized							15,527,943
Convertible Preferred Stock, outstanding		15,527,943		15,527,943	15,527,943	15,527,943
Series C Convertible Preferred Stock | Series C SPA
Temporary Equity [Line Items]
Convertible Preferred Stock, issued		13,539,141			13,539,141
Convertible Preferred Stock, par or stated value per share		$ 6.5366			$ 6.5366
Proceeds from issuance of convertible preferred stock		$ 88,200
Stock issuance costs		$ 300
Convertible Preferred Stock
Temporary Equity [Line Items]
Convertible Preferred Stock, issued	0
Convertible Preferred Stock, par or stated value per share							$ 0.0001
Convertible Preferred Stock, authorized							52,483,788
Number of preferred Stock converted to common stock	31,625,534
Convertible Preferred Stock, outstanding	0
Series Seed Convertible Preferred Stock
Temporary Equity [Line Items]
Convertible Preferred Stock, authorized							3,000,000
Convertible Preferred Stock, outstanding		3,000,000		3,000,000	3,000,000	3,000,000		3,000,000
Series A Convertible Preferred Stock
Temporary Equity [Line Items]
Convertible Preferred Stock, authorized							14,886,305
Convertible Preferred Stock, outstanding		12,786,718		12,842,112	12,786,718	12,842,112		14,720,126
Series B-1 Convertible Preferred Stock
Temporary Equity [Line Items]
Convertible Preferred Stock, authorized							3,059,695
Convertible Preferred Stock, outstanding		3,059,695		3,059,695	3,059,695	3,059,695		3,059,695