Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Total	Share capital [Member]	Warrants [Member]	Contributed surplus [Member]	Contributed surplus - options [Member]	Contributed surplus - units [Member]	Deficit [Member]
Beginning Balance at Nov. 30, 2017	$ 25,665	$ 136,525	$ 2,163	$ 124	$ 18,402	$ 1,319	$ (132,868)
Beginning Balance (Shares) at Nov. 30, 2017		105,684,523
Exercise of options	0	$ 29	0	0	(29)	0	0
Exercise of options (Shares)		50,753
Restricted Share Units	0	$ 457	0	0	0	(457)	0
Restricted Share Units (Shares)		800,000
Stock-based compensation	922	$ 0	0	0	484	438	0
Loss for the period	(2,946)	0	0	0	0	0	(2,946)
Ending Balance at Feb. 28, 2018	23,641	$ 137,011	2,163	124	18,857	1,300	(135,814)
Ending Balance (Shares) at Feb. 28, 2018		106,535,276
Beginning Balance at Nov. 30, 2017	25,665	$ 136,525	2,163	124	18,402	1,319	(132,868)
Beginning Balance (Shares) at Nov. 30, 2017		105,684,523
Loss for the period	(6,610)
Ending Balance at May. 31, 2018	47,059	$ 163,947	2,253	124	18,942	1,361	(139,568)
Ending Balance (Shares) at May. 31, 2018		131,348,458
Beginning Balance at Nov. 30, 2017	25,665	$ 136,525	2,163	124	18,402	1,319	(132,868)
Beginning Balance (Shares) at Nov. 30, 2017		105,684,523
Bought-deal financing (note 8)		$ 28,750
Bought deal financing (Note 8) (Shares)		24,784,482
Share issuance costs		$ (1,805)
Ending Balance at Nov. 30, 2018	32,202	$ 164,069	2,253	122	19,076	1,489	(154,807)
Ending Balance (Shares) at Nov. 30, 2018		131,585,612
Beginning Balance at Feb. 28, 2018	23,641	$ 137,011	2,163	124	18,857	1,300	(135,814)
Beginning Balance (Shares) at Feb. 28, 2018		106,535,276
Bought-deal financing (note 8)	28,750	$ 28,750	90	0	0	0	(90)
Bought deal financing (Note 8) (Shares)		24,784,482
Share issuance costs	(1,819)	$ (1,819)	0	0	0	0	0
Exercise of options	0	$ 5	0	0	(5)	0	0
Exercise of options (Shares)		28,700
Stock-based compensation	151	$ 0	0	0	90	61	0
Loss for the period	(3,664)	0	0	0	0	0	(3,664)
Ending Balance at May. 31, 2018	47,059	$ 163,947	2,253	124	18,942	1,361	(139,568)
Ending Balance (Shares) at May. 31, 2018		131,348,458
Beginning Balance at Nov. 30, 2018	32,202	$ 164,069	2,253	122	19,076	1,489	(154,807)
Beginning Balance (Shares) at Nov. 30, 2018		131,585,612
Exercise of options	0	$ 28	0	0	(28)	0	0
Exercise of options (Shares)		44,230
Restricted Share Units	0	$ 424	0	0	0	(424)	0
Restricted Share Units (Shares)		412,501
Stock-based compensation	1,939	$ 0	0	0	1,586	353	0
Loss for the period	(4,336)	0	0	0	0	0	(4,336)
Ending Balance at Feb. 28, 2019	29,805	$ 164,521	2,253	122	20,634	1,418	(159,143)
Ending Balance (Shares) at Feb. 28, 2019		132,042,343
Beginning Balance at Nov. 30, 2018	32,202	$ 164,069	2,253	122	19,076	1,489	(154,807)
Beginning Balance (Shares) at Nov. 30, 2018		131,585,612
Loss for the period	(8,845)
Ending Balance at May. 31, 2019	25,960	$ 164,574	2,253	122	20,936	1,727	(163,652)
Ending Balance (Shares) at May. 31, 2019		132,143,407
Beginning Balance at Feb. 28, 2019	29,805	$ 164,521	2,253	122	20,634	1,418	(159,143)
Beginning Balance (Shares) at Feb. 28, 2019		132,042,343
Exercise of options	0	$ 53	0	0	(53)	0	0
Exercise of options (Shares)		101,064
Stock-based compensation	664	$ 0	0	0	355	309	0
Loss for the period	(4,509)	0	0	0	0	0	(4,509)
Ending Balance at May. 31, 2019	$ 25,960	$ 164,574	$ 2,253	$ 122	$ 20,936	$ 1,727	$ (163,652)
Ending Balance (Shares) at May. 31, 2019		132,143,407