Stockholders Equity - Equity Offering (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended		6 Months Ended	12 Months Ended
	Jan. 31, 2020	Dec. 31, 2019	Jun. 30, 2020	Dec. 31, 2018
Equity issuances (shares)		6,000,000		0
Shares issued, price per share		$ 15.30
Proceeds from issuance of common stock		$ 91,800	$ 13,364
Over-allotment option
Equity issuances (shares)	900,000
Shares issued, price per share	$ 15.30
Proceeds from issuance of common stock	$ 13,800