Investments (Narrative) (Details) $ in Thousands		12 Months Ended
	Sep. 01, 2016 CAD shares	Nov. 30, 2017 USD ($) shares	Nov. 30, 2017 CAD shares	Nov. 30, 2016 USD ($) shares	Nov. 30, 2015 USD ($)	Jun. 19, 2015
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Warrants Issued	1,000,000	1,000,000	1,000,000
Noncash or Part Noncash Acquisition, Investments Acquired Shares	5,000,000	5,000,000	5,000,000
Sale of Stock, Number of Shares Issued in Transaction		2,525,000	2,525,000	110,000
Sale of Stock, Consideration Received on Transaction | $		$ 3,500		$ 200
Trading Securities, Realized Loss | $		600		60
Trading Securities, Change in Unrealized Holding Gain (Loss) | $		$ (1,645)		$ 88	$ 0
GoldMining Inc [Member]
Noncash or Part Noncash Acquisition, Shares Held		2,365,000	2,365,000	4,890,000
Noncash or Part Noncash Acquisition, Warrants Held		1,000,000	1,000,000	1,000,000
Sunward Investments [Member]
Class Of Warrant Or Right Grants In Period Exercise Price | CAD	CAD 3.50		CAD 3.50
Mineral Property Right Ownership Percentage		100.00%	100.00%			100.00%