Note 13 - Capital and Other Components of Equity (Tables)
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12 Months Ended |
Mar. 31, 2020 |
Notes Tables |
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Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
| | Warrant liabilities issued May 2018 | | | Warrant liabilities issued December 27, 2017 | | | |
March 31, 220 $
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March 31, 219 $
| | | March 31, 2020 $ | | | March 31, 2019 $ | | Exercise price | | | CAD $1.31 | | | | CAD $1.31 | | | | USD $1.26 | | | | USD $1.26 | | Share price | | | CAD $0.53 | | | | CAD $1.35 | | | | USD $0.38 | | | | USD $1.02 | | Risk-free interest | | | 0.66 | % | | | 1.52 | % | | | 0.37 | % | | | 2.23 | % | Contractual life (years) | | | 3.11 | | | | 4.11 | | | | 2.74 | | | | 3.75 | | Expected volatility | | | 107 | % | | | 94.58 | % | | | 125.03 | % | | | 107.57 | % |
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Schedule of Stock Issued for Accrued Interest on Debt [Table Text Block] |
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| | | | | March 31, 2017 | | | | June 30, 2017 | | | | September 30, 2017 | | | | December 31, 2017 | | | | March 31, 2018 | | | | June 30, 2018 | | | | September 30, 2018 | | | | | | | |
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Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block] |
| | March 31, 2020 | | | March 31, 2019 | | | | Number outstanding | | |
| | | Number outstanding | | |
| | | | | | | $ | | | | | | $ | | Liability | | | | | | | | | | | | | | | | | May 2018 public offering warrants 2018 (i) | | | 6,593,750 | | | | 1,146 | | | | 10,188,100 | | | | 6,178 | | Series December 2017 U.S. public offering warrants 2017 (ii) | | | 7,072,962 | | | | 1,247 | | | | 9,801,861 | | | | 6,005 | | | | | 13,666,712 | | | | 2,393 | | | | 19,989,961 | | | | | | Equity | | | | | | | | | | | | | | | | | Public offering warrants | | | | | | | | | | | | | | | | | Public offering broker warrants May 2018 (iii) | | | 222,976 | | | | 89 | | | | 547,975 | | | | 219 | | Public offering U.S. broker warrants December 2017 (iv) | | | 259,121 | | | | 161 | | | | 495,050 | | | | 308 | | Public offering warrants February 2017 (v) | | | 1,723,934 | | | | 631 | | | | 1,904,034 | | | | 697 | | Private Placement- contingent warrants | | | | | | | | | | | | | | | | | 2017 unsecured convertible debenture conversion option and contingent warrants (vi) | | | - | | | | - | | | | 1,052,630 | | | | 235 | | | | | 2,206,031 | | | | 881 | | | | 3,999,689 | | | | 1,459 | |
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Schedule of Stockholders' Equity Note, Warrants or Rights Exercised [Table Text Block] |
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| | May 2018 over-allotment Warrants 2018 | | | 3,594,350 | | | | 3,567 | | Series December 2017 US Public offering Warrants 2017 | | | 2,676,611 | | | | 3,373 | | Public offering warrants February 2017 | | | 180,100 | | | | 292 | | Public offering Broker warrants May 2018 | | | 325,000 | | | | 257 | | Contingent warrants private placement 2017 | | | 150,000 | | | | 217 | | | | | 6,926,061 | | | | 7,706 | |
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Broker Warrants Issued December 2017 [Member] |
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Notes Tables |
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Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
| | April 1, 2018 | | Exercise price | | $ | 1.2625 | | Share price | | $ | 1.02 | | Risk-free interest | | | 2.56 | % | Remaining Contractual life (years) | | | 4.75 | | Expected volatility | | | 95.16 | % |
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Warrants Issued December 27, 2017 [Member] |
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Notes Tables |
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Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
| | December 27, 2017 | | Exercise price | | $ | 1.26 | | Share price | | $ | 0.97 | | Risk-free interest | | | 2.22 | % | Contractual life (years) | | | 5 | | Expected volatility | | | 93.52 | % |
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Broker Warrants Issued May 2018 [Member] |
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Notes Tables |
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Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
| | May 2018 CAD | | Exercise price | | $ | 1.05 | | Share price | | $ | 0.81 | | Risk-free interest | | | 2.20 | | Contractual life (years) | | | 5 | | Expected volatility | | | 87.40 | % |
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Warrants Issued in May 2018 [Member] |
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Notes Tables |
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Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] |
| | May 2018 CAD | | Exercise price | | $ | 1.31 | | Share price | | $ | 0.82 | | Risk-free interest | | | 2.21 | % | Contractual life (years) | | | 5 | | Expected volatility | | | 87.40 | % |
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