CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands		Common Stock	Treasury Stock	Paid-in Capital	Accumulated Deficit	Total
Balance at Dec. 31, 2019		$ 80	$ (1,027)	$ 375,921	$ (225,583)	$ 149,391
Balance (in shares) at Dec. 31, 2019	[1]	40,323,430	144,589
Stock-based compensation				1,031		1,031
DSU compensation				61		61
Net income (loss)					(17,821)	(17,821)
Balance at Mar. 31, 2020		$ 80	$ (1,027)	377,013	(243,404)	132,662
Balance (in shares) at Mar. 31, 2020	[1]	40,323,430	144,589
Balance at Dec. 31, 2019		$ 80	$ (1,027)	375,921	(225,583)	149,391
Balance (in shares) at Dec. 31, 2019	[1]	40,323,430	144,589
Net income (loss)						(29,965)
Balance at Jun. 30, 2020		$ 80	$ (1,027)	378,099	(255,548)	121,604
Balance (in shares) at Jun. 30, 2020	[1]	40,323,430	144,589
Balance at Mar. 31, 2020		$ 80	$ (1,027)	377,013	(243,404)	132,662
Balance (in shares) at Mar. 31, 2020	[1]	40,323,430	144,589
Stock-based compensation				1,086		1,086
Net income (loss)					(12,144)	(12,144)
Balance at Jun. 30, 2020		$ 80	$ (1,027)	378,099	(255,548)	121,604
Balance (in shares) at Jun. 30, 2020	[1]	40,323,430	144,589
Balance at Dec. 31, 2020		$ 108	$ (1,027)	409,728	(147,423)	261,386
Balance (in shares) at Dec. 31, 2020		59,183,076	144,589
Issuance of common stock				1,559		1,559
Number of shares issued		182,453
Stock-based compensation				1,078		1,078
DSUs converted to common stock (in shares)		43,523
Other				(262)		(262)
Net income (loss)					(1,620)	(1,620)
Balance at Mar. 31, 2021		$ 108	$ (1,027)	412,103	(149,043)	262,141
Balance (in shares) at Mar. 31, 2021		59,409,052	144,589
Balance at Dec. 31, 2020		$ 108	$ (1,027)	409,728	(147,423)	261,386
Balance (in shares) at Dec. 31, 2020		59,183,076	144,589
Net income (loss)						11,871
Balance at Jun. 30, 2021		$ 108	$ (1,027)	417,248	(135,552)	280,777
Balance (in shares) at Jun. 30, 2021		59,774,201	144,589
Balance at Mar. 31, 2021		$ 108	$ (1,027)	412,103	(149,043)	262,141
Balance (in shares) at Mar. 31, 2021		59,409,052	144,589
Issuance of common stock				2,662		2,662
Number of shares issued		331,497
Stock-based compensation				2,490		2,490
DSUs converted to common stock (in shares)		33,652
Other				(7)		(7)
Net income (loss)					13,491	13,491
Balance at Jun. 30, 2021		$ 108	$ (1,027)	$ 417,248	$ (135,552)	$ 280,777
Balance (in shares) at Jun. 30, 2021		59,774,201	144,589

[1] Prior period results have been adjusted to reflect the two-for-one reverse split in October 2020.