Earnings (Loss) per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Basic and Diluted Loss per Share
Net loss for the period	$ (49,450)	$ (69,484)	$ (82,764)
Weighted average number of shares outstanding, Basic	43,349,461	12,845,089	7,419,948
Weighted average number of shares outstanding, Diluted	43,349,461	12,845,089	7,419,948
Basic ($ per share)	$ (1.14)	$ (5.41)	$ (11.15)
Diluted ($ per share)	$ (1.14)	$ (5.41)	$ (11.15)