Schedule of Mineral Property Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Aug. 31, 2017	Aug. 31, 2016	Aug. 31, 2017	Aug. 31, 2016
Mineral property expense	$ 8,471	$ 3,077	$ 10,407	$ 4,067
Alaska, USA [Member]
Community	67	63	201	184
Drilling	3,194	712	3,284	712
Engineering	1,085	191	1,508	410
Environmental	122	212	181	235
Geochemistry and geophysics	146	28	151	41
Land and permitting	215	113	667	322
Other income	(26)	(34)	(26)	(34)
Project support	2,307	1,030	2,641	1,136
Wages and benefits	$ 1,361	$ 762	$ 1,800	$ 1,061