Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Share capital [Member]	Warrants [Member]	Contributed surplus [Member]	Contributed surplus - options [Member]	Contributed surplus - units [Member]	Deficit [Member]	Total
Beginning Balance at Nov. 30, 2017	$ 136,525	$ 2,163	$ 124	$ 18,402	$ 1,319	$ (132,868)	$ 25,665
Beginning Balance (Shares) at Nov. 30, 2017	105,684,523
Exercise of options	$ 29	0	0	(29)	0	0	0
Exercise of options (Shares)	50,753
Restricted Share Units	$ 457	0	0	0	(457)	0	0
Restricted Share Units (Shares)	800,000
Stock-based compensation	$ 0	0	0	484	438	0	922
Loss for the period	0	0	0	0	0	(2,946)	(2,946)
Ending Balance at Feb. 28, 2018	$ 137,011	2,163	124	18,857	1,300	(135,814)	23,641
Ending Balance (Shares) at Feb. 28, 2018	106,535,276
Beginning Balance at Nov. 30, 2017	$ 136,525	2,163	124	18,402	1,319	(132,868)	25,665
Beginning Balance (Shares) at Nov. 30, 2017	105,684,523
Loss for the period							(16,530)
Ending Balance at Aug. 31, 2018	$ 164,034	2,253	122	19,011	1,425	(149,488)	37,357
Ending Balance (Shares) at Aug. 31, 2018	131,533,953
Beginning Balance at Nov. 30, 2017	$ 136,525	2,163	124	18,402	1,319	(132,868)	25,665
Beginning Balance (Shares) at Nov. 30, 2017	105,684,523
Bought deal financing	$ 28,750
Bought deal financing (Shares)	24,784,482
Share issuance costs	$ (1,805)
NovaGold DSU conversion	$ 2
NovaGold DSU conversion (Shares)	1,459
Ending Balance at Nov. 30, 2018	$ 164,069	2,253	122	19,076	1,489	(154,807)	32,202
Ending Balance (Shares) at Nov. 30, 2018	131,585,612
Beginning Balance at Feb. 28, 2018	$ 137,011	2,163	124	18,857	1,300	(135,814)	23,641
Beginning Balance (Shares) at Feb. 28, 2018	106,535,276
Exercise of options	$ 5	0	0	(5)	0	0	0
Exercise of options (Shares)	28,700
Bought deal financing	$ 28,750	90	0	0	0	(90)	28,750
Bought deal financing (Shares)	24,784,482
Share issuance costs	$ (1,819)	0	0	0	0	0	(1,819)
Stock-based compensation	0	0	0	90	61	0	151
Loss for the period	0	0	0	0	0	(3,664)	(3,664)
Ending Balance at May. 31, 2018	$ 163,947	2,253	124	18,942	1,361	(139,568)	47,059
Ending Balance (Shares) at May. 31, 2018	131,348,458
Exercise of options	$ 71	0	0	(71)	0	0	0
Exercise of options (Shares)	184,475
Share issuance costs	$ 14	0	0	0	0	0	14
NovaGold DSU conversion	$ 2	0	(2)	0	0	0	0
NovaGold DSU conversion (Shares)	1,020
Stock-based compensation	$ 0	0	0	140	64	0	204
Loss for the period	0	0	0	0	0	(9,920)	(9,920)
Ending Balance at Aug. 31, 2018	$ 164,034	2,253	122	19,011	1,425	(149,488)	37,357
Ending Balance (Shares) at Aug. 31, 2018	131,533,953
Beginning Balance at Nov. 30, 2018	$ 164,069	2,253	122	19,076	1,489	(154,807)	32,202
Beginning Balance (Shares) at Nov. 30, 2018	131,585,612
Exercise of options	$ 28	0	0	(28)	0	0	0
Exercise of options (Shares)	44,230
Restricted Share Units	$ 424	0	0	0	(424)	0	0
Restricted Share Units (Shares)	412,501
Stock-based compensation	$ 0	0	0	1,586	353	0	1,939
Loss for the period	0	0	0	0	0	(4,336)	(4,336)
Ending Balance at Feb. 28, 2019	$ 164,521	2,253	122	20,634	1,418	(159,143)	29,805
Ending Balance (Shares) at Feb. 28, 2019	132,042,343
Beginning Balance at Nov. 30, 2018	$ 164,069	2,253	122	19,076	1,489	(154,807)	32,202
Beginning Balance (Shares) at Nov. 30, 2018	131,585,612
Exercise of warrants	$ 12,166
Exercise of warrants (Shares)	6,521,740
Loss for the period							(21,380)
Ending Balance at Aug. 31, 2019	$ 176,970	0	122	21,183	1,652	(176,187)	23,740
Ending Balance (Shares) at Aug. 31, 2019	138,905,097
Beginning Balance at Feb. 28, 2019	$ 164,521	2,253	122	20,634	1,418	(159,143)	29,805
Beginning Balance (Shares) at Feb. 28, 2019	132,042,343
Exercise of options	$ 53	0	0	(53)	0	0	0
Exercise of options (Shares)	101,064
Stock-based compensation	$ 0	0	0	355	309	0	664
Loss for the period	0	0	0	0	0	(4,509)	(4,509)
Ending Balance at May. 31, 2019	$ 164,574	2,253	122	20,936	1,727	(163,652)	25,960
Ending Balance (Shares) at May. 31, 2019	132,143,407
Exercise of options	$ 41	0	0	(41)	0	0	0
Exercise of options (Shares)	57,818
Deferred Share Units	$ 189	0	0	0	(189)	0	0
Deferred Share Units (Shares)	182,132
Exercise of warrants	$ 12,166	(2,253)	0	0	0	0	9,913
Exercise of warrants (Shares)	6,521,740
Stock-based compensation	$ 0	0	0	288	114	0	402
Loss for the period	0	0	0	0	0	(12,535)	(12,535)
Ending Balance at Aug. 31, 2019	$ 176,970	$ 0	$ 122	$ 21,183	$ 1,652	$ (176,187)	$ 23,740
Ending Balance (Shares) at Aug. 31, 2019	138,905,097