Investments (Narrative) (Details) $ in Thousands	3 Months Ended
	Feb. 28, 2017 USD ($) shares	Feb. 28, 2017 CAD shares	Feb. 29, 2016 USD ($)
Noncash or Part Noncash Acquisition, Investments Acquired Shares | shares	5,000,000	5,000,000
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Warrants Issued | shares	1,000,000	1,000,000
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned	$ 7,800
Gain (Loss) on Disposition of Stock in Subsidiary	$ 3
Sale of Stock, Number of Shares Issued in Transaction | shares	410,000	410,000
Trading Securities, Unrealized Holding Gain	$ (1,239)		$ 0
Sunward Investments [Member]
Class of Warrant or Right, Grants in Period, Exercise Price | CAD		CAD 3.50
Mineral property acquisition	100.00%
Noncash or Part Noncash Divestiture, Amount of Consideration Received	$ 8,100
Noncash or Part Noncash Acquisition Noncash Financial or Equity Instrument Consideration Warrants Value	$ 300