Stockholders' Equity - Additional Information (Details) - USD ($)	1 Months Ended			3 Months Ended		12 Months Ended
	Jan. 31, 2021	Dec. 31, 2020	Jan. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Aug. 31, 2020
Class Of Stock [Line Items]
Maximum amount of sale covered in shelf registration statement							$ 300,000,000
Common stock aggregate offering price, remaining		$ 68,400,000				$ 68,400,000
SVB Leerink LLC
Class Of Stock [Line Items]
Maximum amount of offering issuance and sale covered in sales agreement							$ 75,000,000
Common Stock
Class Of Stock [Line Items]
Number of shares issued				375,654	2,400,000
Number of shares subject to repurchase		256,056		222,660		256,056
Common Stock | Sales Agreement
Class Of Stock [Line Items]
Proceeds from issuance of shares						$ 6,300,000
Gross proceeds from issuance of common stock						$ 6,600,000
Follow-on Public Offering
Class Of Stock [Line Items]
Proceeds from issuance of shares			$ 44,700,000
Follow-on Public Offering | Common Stock
Class Of Stock [Line Items]
Number of shares issued			2,400,000
Shares issued, public offering price per share			$ 20.00
At The Market Offering | Common Stock | Sales Agreement
Class Of Stock [Line Items]
Number of shares issued		3,750,000		0		305,969
Shares issued, public offering price per share		$ 20.00				$ 20.00
Proceeds from issuance of shares		$ 70,000,000
At The Market Offering | Common Stock | Sales Agreement | Weighted Average
Class Of Stock [Line Items]
Shares issued, public offering price per share		$ 21.55				$ 21.55
Underwritten Public Offerings | Common Stock | Sales Agreement | Maximum
Class Of Stock [Line Items]
Number of shares issued		562,500
Public Offering
Class Of Stock [Line Items]
Proceeds from issuance of shares	$ 7,100,000
Public Offering | Common Stock
Class Of Stock [Line Items]
Shares issued, public offering price per share	$ 20.00
Number of shares purchased	375,654