Investments (Narrative) (Details)		3 Months Ended
	Sep. 01, 2016 CAD ($) shares	Feb. 28, 2018 USD ($) shares	Feb. 28, 2017 USD ($) shares
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Warrants Issued	1,000,000
Noncash or Part Noncash Acquisition, Investments Acquired Shares	5,000,000
Sale of Stock, Number of Shares Issued in Transaction		1,360,000	410,000
Sale of Stock, Consideration Received on Transaction | $		$ 1,400,000	$ 600,000
Trading Securities, Realized Loss | $		800,000	0
Trading Securities, Change in Unrealized Holding Gain (Loss) | $		$ 639,000	$ (1,239,000)
GoldMining Inc [Member]
Noncash or Part Noncash Acquisition, Shares Held		1,005,000	2,365,000
Noncash or Part Noncash Acquisition, Warrants Held		1,000,000	1,000,000
Sunward Investments [Member]
Class Of Warrant Or Right Grants In Period Exercise Price | $	$ 3.50