Redeemable Convertible Preferred Stock and Stockholders' (Deficit) Equity - Additional Information (Details) $ / shares in Units, $ in Thousands				1 Months Ended	9 Months Ended	12 Months Ended
	Sep. 15, 2020 shares	Jun. 11, 2020 $ / shares shares	Jun. 08, 2020 USD ($) shares	Jun. 30, 2020	Sep. 30, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) PreferredStock $ / shares shares	Jun. 23, 2020 shares	Aug. 31, 2017 $ / shares shares
Redeemable Convertible Preferred Stock And Stockholders Deficit Equity [Line Items]
Number of outstanding series of redeemable convertible preferred stock | PreferredStock						8
Accretion to redemption values | $						$ 132,800
Common stock, issued	10,800,000
Gross proceeds from issuance of preferred stock | $					$ 21,694
Preferred stock converted into common stock		85,533,394
Preferred stock, authorized		10,000,000
Preferred stock, issued					0
Preferred Stock, outstanding					0
Forward stock split		2		2
Common stock, par value | $ / shares		$ 0.001			$ 0.001	$ 0.001
Common stock, voting rights					one vote
Stock split, description				2-for-1	On June 11, 2020, the Company amended its certificate of incorporation to effect a 2-for-1 forward stock split of shares of the Company’s outstanding common stock, such that each share of common stock, $0.001 par value became two shares of common stock, $0.001 par value per share.
Common stock, shares authorized		500,000,000			500,000,000	113,443,854
Series B Warrants
Redeemable Convertible Preferred Stock And Stockholders Deficit Equity [Line Items]
Warrants to purchase shares of common stock		155,862
Exercise price | $ / shares					$ 0.72
Maximum | Series B Warrants
Redeemable Convertible Preferred Stock And Stockholders Deficit Equity [Line Items]
Warrants to purchase shares of common stock					161,136
Series H Preferred Stock
Redeemable Convertible Preferred Stock And Stockholders Deficit Equity [Line Items]
Common stock, issued			1,964,766
Gross proceeds from issuance of preferred stock | $			$ 26,700
Series F Preferred Stock Warrant
Redeemable Convertible Preferred Stock And Stockholders Deficit Equity [Line Items]
Warrants to purchase shares of common stock							480,250
Exercise price | $ / shares								$ 8.53
Series F Preferred Stock Warrant | Maximum
Redeemable Convertible Preferred Stock And Stockholders Deficit Equity [Line Items]
Warrants to purchase shares of common stock								589,970