Consolidated Statements of Redeemable Convertible Preferred Stock and Stockholders’ Equity (Deficit) - 12 months ended Dec. 31, 2019 - USD ($) $ in Thousands	Common Stock	Redeemable Convertible Preferred Stock SeriesA and Series B Redeemable Convertible Preferred Stock	Redeemable Convertible Preferred Stock Series B Redeemable Convertible Preferred Stock	Redeemable Convertible Preferred Stock	Total
Balance at Dec. 31, 2018				$ 16,746	$ 16,746
Balance (in shares) at Dec. 31, 2018				4,801,020	4,801,020
Increase (Decrease) in Temporary Equity [Roll Forward]
Issuance of redeemable convertible preferred stock, net issuance costs			$ 24,166
Issuance of redeemable convertible preferred stock, net issuance costs (in shares)	594,850		3,463,593
Conversion of Series A and B redeemable convertible preferred stock into common stock		$ (40,912)
Conversion of Series A and B redeemable convertible preferred stock into common stock (in shares)		(8,264,613)
Balance (in shares) at Dec. 31, 2019					0