Stockholders' Equity - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	Apr. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Jan. 31, 2020
Class of Stock [Line Items]
Proceeds from issuance of common stock, net		$ 2,942,000	$ 46,277,000
Aggregate offering amount				$ 200,000,000.0
Gross proceeds		$ 2,900,000
April 2019 Offering
Class of Stock [Line Items]
Common stock, shares, issued and sold (in shares)	4,124,475
Common stock, public offering price (in usd per share)	$ 12.00
Proceeds from issuance of common stock, net	$ 46,300,000
Common Stock
Class of Stock [Line Items]
Common stock, shares, issued and sold (in shares)		561,848	4,124,475
Equity Distribution Agreement with Citigroup Global Markets Inc. and William Blair & Company, L.L.C.
Class of Stock [Line Items]
Aggregate offering amount				$ 60,000,000.0