Stockholder's Equity- Additional Information (Details) - $ / shares	Sep. 30, 2020	Jun. 30, 2020	May 31, 2020	May 27, 2020	Dec. 31, 2019
Class Of Stock [Line Items]
Authorized capital	310,000,000				81,244,834
Common stock, shares authorized	300,000,000				49,019,607
Common stock, par value	$ 0.001				$ 0.001
Redeemable convertible preferred stock, shares authorized	0				32,225,227
Redeemable convertible preferred stock, par value	$ 0.001				$ 0.001
Preferred stock, shares authorized	10,000,000				10,000,000
Preferred stock, Par value	$ 0.001				$ 0.001
Preferred stock, shares outstanding	0				0
Class of warrant exercised for cash		77,030
Number of common stock shares issued upon exercise of preferred stock warrants		74,723
Redeemable Convertible Preferred Stock Warrants
Class Of Stock [Line Items]
Converted into warrants to purchase common stock			256,588	256,588
Common Stock Warrants
Class Of Stock [Line Items]
Class of warrant exercised for cash		27,810
Series A Preferred Stock
Class Of Stock [Line Items]
Redeemable convertible preferred stock, shares authorized					6,299,019
Series B Preferred Stock
Class Of Stock [Line Items]
Redeemable convertible preferred stock, shares authorized					11,270,319
Series C Preferred Stock
Class Of Stock [Line Items]
Redeemable convertible preferred stock, shares authorized					14,655,889