Note 11 - Derivative Warrant Liabilities (Tables)

12 Months Ended

Mar. 31, 2018

Statement Line Items [Line Items]

Disclosure of maturity analysis for derivative financial liabilities [text block]

Warrant liabilities issued December 27, 2017
		Thirteen-month period	Month ended	Twelve-month period
	March 31, 2018	Ended, March 31, 2017	March 31, 2017 (Unaudited)	ended February 28, 2017 (Unaudited)
	$	$	$	$
Balance – beginning of period	-	-	-	-
Issued during period (note 13b)	5,873	-	-	-
Change in fair value of derivative warrant liabilities	532	-	-	-
Balance – end of period	6,405	-	-	-

Warrant liabilities issued December 3, 2013 1
			Thirteen-month period	Month ended	Twelve-month period
	March 31, 2018		ended, March 31, 2017	March 31, 2017 (Unaudited)	ended February 28, 2017 (Unaudited)
	$		$	$	$
Balance – beginning of period	209		156	187	156
Change in fair value of derivative warrant liabilities	(188	)	53	22	31
Balance – end of period	21		209	209	187

Derivative warrant liabilities [member]

Statement Line Items [Line Items]

Disclosure of sensitivity analysis for actuarial assumptions [text block]

Warrant liabilities issued December 27, 2017
	March 31, 2018		March 31, 2017	February 28, 2017 (Unaudited)
Exercise price	US $1.26		—	—
Share price	US $1.02		—	—
Dividend	—		—	—
Risk-free interest	2.56	%	—	—
Estimated life (in years)	4.75		—	—
Expected volatility	95.16	%	—	—

Warrant liabilities issued December 3, 2013 1
	March 31, 2018		March 31, 2017		February 28, 2017 (Unaudited)
Exercise price	US $1.50		US $1.50		US $1.50
Share price (1)	US $1.02		US $1.36		US $1.25
Dividend	—		—		—
Risk-free interest	2.19	%	1.22	%	1.24	%
Estimated life (in years)	0.68		1.68		1.76
Expected volatility	133.86	%	108.35	%	107.36	%