Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Note 14 - Capital and Other Components of Equity - Warrants Outstanding (Details)

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Note 14 - Capital and Other Components of Equity - Warrants Outstanding (Details) - CAD ($)
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Feb. 28, 2017
Feb. 21, 2017
Statement Line Items [Line Items]          
Warrants and rights outstanding         $ 144,000
May 2018 public offering warrants 2018 [member]          
Statement Line Items [Line Items]          
Warrants (in shares) [1] 10,188,100  
Warrants and rights outstanding [1] $ 8,246,000  
Series December 2017 US public offering warrants 2017 [member]          
Statement Line Items [Line Items]          
Warrants (in shares) [2] 9,801,861 9,802,935  
Warrants and rights outstanding [2] $ 8,017,000 $ 6,405,000  
Series 8 December 2013 Public offering warrants related to liability [member]          
Statement Line Items [Line Items]          
Warrants (in shares) [3] 18,400,000 18,400,000 18,400,000  
Warrants and rights outstanding [3] $ 21,000 $ 209,000 $ 187,000  
Warrants relating to liabilities [member]          
Statement Line Items [Line Items]          
Warrants (in shares) 19,989,961 28,202,935 18,400,000 18,400,000  
Warrants and rights outstanding $ 16,263,000 $ 6,426,000 $ 209,000 $ 187,000  
Warrants issued to broker in May 2018 public offering [Member]          
Statement Line Items [Line Items]          
Warrants (in shares) [4] 547,975  
Warrants and rights outstanding [4] $ 283,000  
Warrants issued to broker in December 2017 public offering [Member]          
Statement Line Items [Line Items]          
Warrants (in shares) [5] 495,050 495,050  
Warrants and rights outstanding [5] $ 406,000 $ 406,000  
Public offering warrants February 2017, equity portion [member]          
Statement Line Items [Line Items]          
Warrants (in shares) [6] 1,904,034 1,904,034 1,965,259 1,965,259  
Warrants and rights outstanding [6]  
The 2017 Unsecured convertible debenture conversion option and contingent warrant related to equity [member]          
Statement Line Items [Line Items]          
Warrants (in shares) [7] 1,052,630 1,052,630 1,052,630 1,052,630  
Warrants and rights outstanding [7] $ 309,000 $ 309,000 $ 309,000 $ 309,000  
Series 9 Private Placement warrants 2013 related to equity [member]          
Statement Line Items [Line Items]          
Warrants (in shares) [8] 161,654 161,654 161,654  
Warrants and rights outstanding [8]  
Series 2017-BW Broker warrants related to equity [member]          
Statement Line Items [Line Items]          
Warrants (in shares) [9] 234,992 234,992  
Warrants and rights outstanding [9] $ 144,000 $ 144,000  
Warrants related to equity [member]          
Statement Line Items [Line Items]          
Warrants (in shares) 3,999,689 3,613,368 3,414,535 3,414,535  
Warrants and rights outstanding $ 998,000 $ 715,000 $ 453,000 $ 453,000  
[1] Warrant to acquire one Common Share of the Corporation at an exercise price of $1.31, expiring on May 9, 2023.
[2] Warrant to acquire one Common Share of the Corporation at an exercise price of US$1.26, expiring on December 27, 2022.
[3] In order to obtain one Common Share of the Corporation at an exercise price of US$15.00, 10 warrants must be exercised. Warrants expired on December 3, 2018.
[4] Warrant to acquire one Common Share of the Corporation at an exercise price of $1.05, expiring on May 9, 2023.
[5] Warrant to acquire one Common Share of the Corporation at an exercise price of US$1.2625, expiring on December 27, 2022.
[6] Warrant to acquire one Common Share of the Corporation at an exercise price of $2.15, expiring on February 21, 2022.
[7] Warrant to acquire one Common Share of the Corporation at an exercise price of $1.90 expiring on February 21, 2020, net of deferred tax expense of $129. Exercisable only for any portion of or all debentures paid by the Corporation prior to maturity.
[8] Warrant to acquire one Common Share of the Corporation at an exercise price of $13.30, expired on December 3, 2018.
[9] Warrant to acquire one Common Share of the Corporation at an exercise price of 2.15 expiring on February 21, 2018. 117,496 warrants amounted to $71 were exercised in November 2017 and 117,496 warrants expired on February 21, 2018