Organization - Additional Information (Details) $ / shares in Units, $ in Thousands	1 Months Ended			9 Months Ended
	May 31, 2020 USD ($) $ / shares shares	Mar. 31, 2020	Dec. 31, 2019 USD ($) $ / shares shares	Sep. 30, 2020 USD ($) $ / shares shares	May 27, 2020 shares
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Net proceeds from IPO | $	$ 163,000			$ 164,361
Underwriters' discounts and commissions | $	12,600
Offering costs | $	$ 3,700
Offering cost incurred | $			$ 1,400
Preferred stock converted into common stock	31,968,570
Common stock, shares authorized			49,019,607	300,000,000
Common stock, par value | $ / shares			$ 0.001	$ 0.001
Preferred stock, shares authorized			10,000,000	10,000,000
Preferred stock, par value | $ / shares			$ 0.001	$ 0.001
Reverse stock split, conversion ratio	0.833333333	0.840336134
Redeemable Convertible Preferred Stock Warrants
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Converted into warrants to purchase common stock	256,588				256,588
Series A B and C Redeemable Convertible Preferred Stock
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Preferred stock converted into common stock	31,968,570
Preferred stock, conversion basis				Upon the completion of the IPO, all shares of Series A, B, and C redeemable convertible preferred stock then outstanding were converted into 31,968,570 shares of common stock on a one-to-one basis.
IPO
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Stock issued	9,432,949
Public offering price | $ / shares	$ 19.00
Common stock, shares authorized	300,000,000
Common stock, par value | $ / shares	$ 0.001
Preferred stock, shares authorized	10,000,000
Preferred stock, par value | $ / shares	$ 0.001
Over-allotment Option
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Sale of stock, shares issued	1,230,384