Loss Per Common Share - Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2020	Sep. 30, 2019
Earnings Per Share [Abstract]
Net loss	$ (8,822)	$ (4,311)	$ 1,150	$ (5,816)	$ (5,220)	$ (5,286)	$ (11,983)	$ (16,322)
Weighted average basic and diluted common shares outstanding (in shares)	87,227,136			64,651,040			87,160,520	51,200,072
Basic and diluted loss per common share (in usd per share)	$ (0.10)			$ (0.09)			$ (0.14)	$ (0.32)