Segment information (Tables)

3 Months Ended

9 Months Ended

12 Months Ended

Aug. 31, 2015

Aug. 31, 2014

Aug. 31, 2015

Aug. 31, 2014

Nov. 30, 2014

Schedule of Segment Reporting Information [Table Text Block]

		Antioquia,	Corporate and
	Alaska, USA	Colombia	other		Total
	$	$	$		$
Amortization	19	30	14		63
Foreign exchange loss	4	27	31		62
Interest and other income	-	-	(8	)	(8	)
Mineral properties expense	2,731	124	57		2,912
Overhead costs	47	-	1,086		1,133
Loss for the period	2,801	181	1,180		4,162

For the three months ended August 31, 2014:
		Antioquia,	Corporate and
	Alaska, USA	Colombia	other		Total
	$	$	$		$
Amortization	131	-	12		143
Foreign exchange loss	-	-	6		6
Interest and other income	-	-	(1	)	(1	)
Mineral properties expense	636	-	211		847
Overhead costs	774	-	1,142		1,916
Loss for the period	1,541	-	1,370		2,911

		Antioquia,	Corporate and
	Alaska, USA	Colombia	other		Total
	$	$	$		$
Amortization	231	30	38		299
Foreign exchange loss	7	27	1		35
Interest and other income	-	-	(12	)	(12	)
Mineral properties expense	3,279	124	127		3,530
Overhead costs	79	-	3,511		3,590
Loss for the period	3,596	181	3,665		7,442

For the nine months ended August 31, 2014:
		Antioquia,	Corporate and
	Alaska, USA	Colombia	other		Total
	$	$	$		$
Amortization	576	-	33		609
Foreign exchange loss	2	-	14		16
Interest and other income	-	-	(2	)	(2	)
Mineral properties expense	1,602	-	314		1,916
Overhead costs	1,032	-	4,048		5,080
Loss for the period	3,212	-	4,407		7,619

Schedule of Segment Assets and Liabilties [Table Text Block]

As of August 31, 2015:
			Antioquia,		Corporate and
	Alaska, USA		Colombia		other		Total
	$		$		$		$
Mineral properties and development costs	30,586		3,264		-		33,850
Plant and equipment	134		305		71		510
Assets	31,303		3,691		18,509		53,503
Liabilities	(1,072	)	(15	)	(287	)	(1,374	)

As of November 30, 2014:
			Antioquia,	Corporate and
	Alaska, USA		Colombia	other		Total
	$		$	$		$
Mineral properties and development costs	30,586		-	-		30,586
Plant and equipment	311		-	104		415
Assets	5,439		-	31,387		36,826
Liabilities	(924	)	-	(55	)	(979	)