Subsequent Events (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Subsequent Event [Line Items]
Proceeds from issuance of common stock				$ 472	$ 46,308
Aggregate offering price				200,000
Equity Distribution Agreement with Citigroup Global Markets Inc. and William Blair & Company, L.L.C.
Subsequent Event [Line Items]
Aggregate offering price				$ 60,000
Common Stock
Subsequent Event [Line Items]
Issuance of common stock in public offering, net (in shares)		80,523	4,124,475	80,523
Subsequent Event
Subsequent Event [Line Items]
Proceeds from issuance of common stock	$ 2,400
Aggregate offering price	197,100
Subsequent Event | Equity Distribution Agreement with Citigroup Global Markets Inc. and William Blair & Company, L.L.C.
Subsequent Event [Line Items]
Aggregate offering price	$ 57,100
Subsequent Event | Common Stock
Subsequent Event [Line Items]
Issuance of common stock in public offering, net (in shares)	481,325