Interim Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Share capital	Contributed surplus.	Contributed surplus - options	Contributed surplus - units.	Deficit	Total
Beginning Balance at Nov. 30, 2019	$ 177,971	$ 122	$ 21,123	$ 1,759	$ (182,712)	$ 18,263
Beginning Balance (Shares) at Nov. 30, 2019	140,427,761
Exercise of options	$ 6		(6)
Exercise of options (Shares)	19,514
Restricted Share Units	$ 330			(330)
Restricted Share Units (Shares)	212,501
Stock-based compensation			1,155	41		1,196
Earnings (Loss) for the period					171,179	171,179
Ending Balance at Feb. 29, 2020	$ 178,307	122	22,272	1,470	(11,533)	190,638
Ending Balance (Shares) at Feb. 29, 2020	140,659,776
Beginning Balance at Nov. 30, 2019	$ 177,971	122	21,123	1,759	(182,712)	18,263
Beginning Balance (Shares) at Nov. 30, 2019	140,427,761
Earnings (Loss) for the period						164,993
Ending Balance at Aug. 31, 2020	$ 179,310	122	23,024	1,549	(17,719)	186,286
Ending Balance (Shares) at Aug. 31, 2020	142,978,805
Beginning Balance at Nov. 30, 2019	$ 177,971	122	21,123	1,759	(182,712)	18,263
Beginning Balance (Shares) at Nov. 30, 2019	140,427,761
Exercise of options (Shares)	3,297,588
Restricted Share Units (Shares)	412,501
Ending Balance at Nov. 30, 2020	$ 179,746	122	23,303	1,585	(20,945)	183,811
Ending Balance (Shares) at Nov. 30, 2020	144,137,850
Beginning Balance at Feb. 29, 2020	$ 178,307	122	22,272	1,470	(11,533)	190,638
Beginning Balance (Shares) at Feb. 29, 2020	140,659,776
Exercise of options	$ 31		(31)
Exercise of options (Shares)	63,110
Restricted Share Units	$ 312			(312)
Restricted Share Units (Shares)	200,000
Stock-based compensation			420	350		770
Earnings (Loss) for the period					(3,002)	(3,002)
Ending Balance at May. 31, 2020	$ 178,650	122	22,661	1,508	(14,535)	188,406
Ending Balance (Shares) at May. 31, 2020	140,922,886
Exercise of options	$ 660		(660)
Exercise of options (Shares)	2,055,919
Stock-based compensation			1,023	41		1,064
Earnings (Loss) for the period					(3,184)	(3,184)
Ending Balance at Aug. 31, 2020	$ 179,310	122	23,024	1,549	(17,719)	186,286
Ending Balance (Shares) at Aug. 31, 2020	142,978,805
Beginning Balance at Nov. 30, 2020	$ 179,746	122	23,303	1,585	(20,945)	183,811
Beginning Balance (Shares) at Nov. 30, 2020	144,137,850
Exercise of options	$ 334		(334)
Exercise of options (Shares)	76,635
Stock-based compensation			2,112	36		2,148
Earnings (Loss) for the period					(4,516)	(4,516)
Ending Balance at Feb. 28, 2021	$ 180,080	122	25,081	1,621	(25,461)	181,443
Ending Balance (Shares) at Feb. 28, 2021	144,214,485
Beginning Balance at Nov. 30, 2020	$ 179,746	122	23,303	1,585	(20,945)	183,811
Beginning Balance (Shares) at Nov. 30, 2020	144,137,850
Exercise of options (Shares)	313,635
Earnings (Loss) for the period						(15,593)
Ending Balance at Aug. 31, 2021	$ 180,392	122	25,750	1,682	(36,538)	171,408
Ending Balance (Shares) at Aug. 31, 2021	144,451,485
Beginning Balance at Feb. 28, 2021	$ 180,080	122	25,081	1,621	(25,461)	181,443
Beginning Balance (Shares) at Feb. 28, 2021	144,214,485
Exercise of options	$ 308		(202)			106
Exercise of options (Shares)	232,000
Stock-based compensation			488	36		524
Earnings (Loss) for the period					(3,413)	(3,413)
Ending Balance at May. 31, 2021	$ 180,388	122	25,367	1,657	(28,874)	178,660
Ending Balance (Shares) at May. 31, 2021	144,446,485
Exercise of options	$ 4		(1)			3
Exercise of options (Shares)	5,000
Stock-based compensation			384	25		409
Earnings (Loss) for the period					(7,664)	(7,664)
Ending Balance at Aug. 31, 2021	$ 180,392	$ 122	$ 25,750	$ 1,682	$ (36,538)	$ 171,408
Ending Balance (Shares) at Aug. 31, 2021	144,451,485