Note 12 - Income Taxes (Tables)

12 Months Ended

Nov. 30, 2017

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Years ended November 30,
	2017		2016			2015
Current:
Canada	$	—	$	—		$	—
Foreign		350		346			155
		350		346			155
Deferred:
Canada		382		(69	)		(2	)
Foreign		—		—			—
		382		(69	)		(2	)
Income tax expense	$	732	$	277		$	153

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	Years ended November 30,
	2017			2016			2015
Canada	$	(20,501	)	$	(18,912	)	$	(14,775	)
Foreign		(17,783	)		(14,657	)		(17,024	)
	$	(38,284	)	$	(33,569	)	$	(31,799	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Years ended November 30,
	2017			2016			2015
Loss before income taxes		(38,284	)		(33,569	)		(31,799	)
Combined federal and provincial statutory tax rate		26	%		26	%		26	%
Income tax recovery based on statutory income tax rates		(9,954	)		(8,728	)		(8,268	)
Reconciling items:
Effect of future statutory tax rate change		(1,679	)		—			—
Non-deductible expenditures		2,485			2,607			1,906
Foreign accrual property income		(439	)		862			1,269
Effect of different statutory tax rates on earnings or losses of subsidiaries		(2,690	)		(2,218	)		(2,619	)
Effect of tax losses expired		8			6			3,878
Change in valuation allowance on deferred tax assets		13,025			7,668			3,264
Other		(24	)		80			723
Income tax expense	$	732		$	277		$	153

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	At November 30,
	2017			2016
Deferred tax income assets:
Asset retirement obligation	$	75		$	89
Net operating loss carry forwards		233,885			222,036
Capital loss carry forwards		33,666			31,352
Mineral properties		17,887			16,503
Intangible assets		494			456
Property and equipment		224			203
Investment in affiliates		44,484			42,743
Share issuance costs		74			137
Unpaid interest expense		3,044			3,044
Unrealized loss on investments		329			319
Investment tax credit		3,044			2,921
Other		1,200			1,137
		338,406			320,940
Valuation allowances		(297,770	)		(282,698	)
		40,636			38,242
Deferred income tax liabilities:
Investment in affiliates		(39,058	)		(36,110	)
Mineral properties		(12,174	)		(11,251	)
Investment tax credit		(822	)		(760	)
Unrealized gain on investments		(22	)		—
Capitalized assets and other		(177	)		(859	)
		(52,253	)		(48,980	)
Net deferred income tax liabilities	$	(11,617	)	$	(10,738	)

	At November 30,
	2017			2016
Long-term deferred income tax:
Assets	$	9,761		$	9,397
Liabilities		(21,378	)		(20,135	)
	$	(11,617	)	$	(10,738	)

Summary of Operating Loss Carryforwards [Table Text Block]

Year of Expiry	U.S.		Canada
2024	$	1,032	$	—
2025		1,246		—
2026		13,382		25,382
2027		18,493		4,077
2028		85		538
2029		11,223		12,679
2030		10,916		18,242
2031		16,580		17,115
2032		309,772		29,984
2033		14,529		22,423
2034		15,607		10,383
2035		16,383		6,872
2036		14,764		9,433
2037		14,198		11,016
	$	458,210	$	168,144