Organization - Additional Information (Details) $ / shares in Units, $ in Thousands			1 Months Ended	3 Months Ended	6 Months Ended
	Sep. 20, 2019 USD ($) $ / shares shares	Sep. 19, 2019 shares	Aug. 31, 2019	Jun. 30, 2019 shares	Jun. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
Subsidiary Sale Of Stock [Line Items]
Reverse stock split ratio			6.6084
Reverse stock split ratio, description					6.6084–for-1
Accumulated deficit | $					$ 143,668	$ 107,205
Cash, and investments | $					$ 203,100
Common Stock
Subsidiary Sale Of Stock [Line Items]
Common stock, shares issued				7,565
Conversion of convertible preferred stock into common stock, shares		10,787,861
IPO
Subsidiary Sale Of Stock [Line Items]
Common stock, shares issued	12,578,125
Common stock, price per share | $ / shares	$ 16.00
Common stock, exercised by underwriters	1,640,625
Proceeds from IPO, net of underwriting discounts and commission and offering costs | $	$ 183,000
Non-voting Common Stock
Subsidiary Sale Of Stock [Line Items]
Conversion of convertible preferred stock into common stock, shares	6,431,205