Nature of the Bustiness - Additional Information (Details) $ / shares in Units, $ in Thousands			3 Months Ended				6 Months Ended
	Aug. 03, 2020 USD ($) $ / shares shares	Jul. 22, 2020	Jun. 30, 2020 USD ($) shares	Mar. 31, 2020 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) shares	Jun. 30, 2019 USD ($)	Aug. 04, 2020 shares	Dec. 31, 2019 USD ($) shares
Preferred stock, shares outstanding | shares			59,398,350				59,398,350			59,398,350
Cash, cash equivalents, and short-term investments			$ 104,500				$ 104,500
Net losses attributable to common stockholders			(11,632)	$ (9,339)	$ (5,302)	$ (2,524)	(20,971)	$ (7,826)
Accumulated deficit			$ (76,290)				$ (76,290)			$ (55,319)
Subsequent Event
Net proceeds from issuance initial public offering	$ 292,400
Subsequent Event | Convertible Preferred Stock
Preferred stock, shares outstanding | shares									0
Subsequent Event | IPO
Common stock issued and sold | shares	18,687,500
Public offering price per share | $ / shares	$ 17.00
Gross proceeds from issuance of common stock	$ 317,700
Reverse stock split, description	1-for-1.49020520953831	1-for-1.49020520953831
Reverse stock split, ratio	0.6710	0.6710
Subsequent Event | IPO | Common Stock
Stock issued upon conversion of preferred stock | shares	39,859,139