Stockholders' Equity - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Apr. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Class of Stock [Line Items]
Aggregate offering price						$ 200,000,000.0
Proceeds from issuance of common stock				$ 472,000	$ 46,308,000
Common Stock
Class of Stock [Line Items]
Common stock, shares, issued and sold		80,523	4,124,475	80,523
Equity Distribution Agreement with Citigroup Global Markets Inc. and William Blair & Company, L.L.C.
Class of Stock [Line Items]
Aggregate offering price						$ 60,000,000.0
April 2019 Offering
Class of Stock [Line Items]
Common stock, shares, issued and sold	4,124,475
Common stock, public offering price (in usd per share)	$ 12.00
Proceeds from issuance of common stock in public offering, net	$ 46,300,000