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SHARE CAPITAL (Disclosure of outstanding options to acquire common shares) (Details)
 12 Months Ended
Mar. 31, 2022
CAD ($)
Share
$ / shares
Mar. 31, 2021
CAD ($)
Share
$ / shares
Mar. 31, 2020
Share
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Number of Options Issued 8,692,334 7,021,667 4,775,000
Number of Options Exercisable 6,738,001 5,050,832  
Grant date fair value | $ $ 10,545,210 $ 4,822,083  
Weighted average remaining contractual life 2 years 8 months 12 days 3 years 2 months 8 days  
Expire July 5, 2021 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date   July 5, 2021  
Exercise Price | $ / shares   $ 0.72  
Number of Options Issued   340,000  
Number of Options Exercisable   340,000  
Grant date fair value | $   $ 190,400  
Weighted average remaining contractual life   3 months 3 days  
Expire April 13, 2023 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date April 13, 2023    
Exercise Price | $ / shares $ 1.76    
Number of Options Issued 50,000    
Number of Options Exercisable 50,000    
Grant date fair value | $ $ 46,000    
Weighted average remaining contractual life 1 year 14 days    
Expire July 3, 2023 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date July 3, 2023 July 3, 2023  
Exercise Price | $ / shares $ 0.5 $ 0.5  
Number of Options Issued 1,350,000 1,350,000  
Number of Options Exercisable 1,350,000 1,350,000  
Grant date fair value | $ $ 405,000 $ 405,000  
Weighted average remaining contractual life 1 year 3 months 3 days 2 years 3 months 3 days  
Expire August 13, 2023 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date August 13, 2023 August 13, 2023  
Exercise Price | $ / shares $ 0.53 $ 0.53  
Number of Options Issued 650,000 800,000  
Number of Options Exercisable 650,000 800,000  
Grant date fair value | $ $ 214,500 $ 264,000  
Weighted average remaining contractual life 1 year 4 months 13 days 2 years 4 months 13 days  
Expire November 14, 2023 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date November 14, 2023 November 14, 2023  
Exercise Price | $ / shares $ 0.4 $ 0.4  
Number of Options Issued 100,000 100,000  
Number of Options Exercisable 100,000 100,000  
Grant date fair value | $ $ 26,000 $ 26,000  
Weighted average remaining contractual life 1 year 7 months 13 days 2 years 7 months 13 days  
Expire December 9, 2023 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date December 9, 2023 December 9, 2023  
Exercise Price | $ / shares $ 1.64 $ 1.64  
Number of Options Issued 250,000 250,000  
Number of Options Exercisable 166,667 83,333  
Grant date fair value | $ $ 227,500 $ 227,500  
Weighted average remaining contractual life 1 year 8 months 8 days 2 years 8 months 8 days  
Expire December 30, 2023 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date December 30, 2023 December 30, 2023  
Exercise Price | $ / shares $ 3.32 $ 3.32  
Number of Options Issued 425,000 425,000  
Number of Options Exercisable 283,333 141,667  
Grant date fair value | $ $ 816,000 $ 816,000  
Weighted average remaining contractual life 1 year 9 months 2 years 6 months  
Expire June 30, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date June 30, 2024    
Exercise Price | $ / shares $ 3.5    
Number of Options Issued 150,000    
Number of Options Exercisable 50,000    
Grant date fair value | $ $ 301,500    
Weighted average remaining contractual life 2 years 3 months    
Expire July 17, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date July 17, 2024 July 17, 2024  
Exercise Price | $ / shares $ 0.4 $ 0.4  
Number of Options Issued 1,175,000 1,225,000  
Number of Options Exercisable 1,175,000 1,225,000  
Grant date fair value | $ $ 199,750 $ 208,250  
Weighted average remaining contractual life 2 years 3 months 18 days 3 years 3 months 18 days  
Expire July 23, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date July 23, 2024    
Exercise Price | $ / shares $ 3.1    
Number of Options Issued 25,000    
Number of Options Exercisable 8,333    
Grant date fair value | $ $ 43,750    
Weighted average remaining contractual life 2 years 3 months 25 days    
Expire September 3, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date September 3, 2024    
Exercise Price | $ / shares $ 3.69    
Number of Options Issued 100,000    
Number of Options Exercisable 66,667    
Grant date fair value | $ $ 212,000    
Weighted average remaining contractual life 2 years 5 months 4 days    
Expire September 21, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date September 21, 2024    
Exercise Price | $ / shares $ 4.08    
Number of Options Issued 120,000    
Number of Options Exercisable 40,000    
Grant date fair value | $ $ 277,200    
Weighted average remaining contractual life 2 years 5 months 23 days    
Expire October 13, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date October 13, 2024    
Exercise Price | $ / shares $ 4.92    
Number of Options Issued 100,000    
Number of Options Exercisable 33,333    
Grant date fair value | $ $ 189,333    
Weighted average remaining contractual life 2 years 6 months 14 days    
Expire October 22, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date   October 22, 2024  
Exercise Price | $ / shares   $ 0.4  
Number of Options Issued   50,000  
Number of Options Exercisable   50,000  
Grant date fair value | $   $ 12,000  
Weighted average remaining contractual life   3 years 6 months 21 days  
Expire October 26, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date October 26, 2024    
Exercise Price | $ / shares $ 4.77    
Number of Options Issued 50,000    
Number of Options Exercisable 16,667    
Grant date fair value | $ $ 137,500    
Weighted average remaining contractual life 2 years 6 months 29 days    
Expire November 1, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date November 1, 2024    
Exercise Price | $ / shares $ 5.67    
Number of Options Issued 100,000    
Number of Options Exercisable 33,333    
Grant date fair value | $ $ 321,000    
Weighted average remaining contractual life 2 years 7 months 2 days    
Expire December 10, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date December 10, 2024 December 10, 2024  
Exercise Price | $ / shares $ 0.4 $ 0.4  
Number of Options Issued 40,000 90,000  
Number of Options Exercisable 40,000 90,000  
Grant date fair value | $ $ 7,600 $ 17,100  
Weighted average remaining contractual life 2 years 8 months 12 days 3 years 8 months 12 days  
Expire December 29, 2024 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date December 29, 2024    
Exercise Price | $ / shares $ 5.22    
Number of Options Issued 200,000    
Number of Options Exercisable 66,667    
Grant date fair value | $ $ 592,000    
Weighted average remaining contractual life 2 years 9 months    
Expire January 14, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date January 14, 2025    
Exercise Price | $ / shares $ 4.25    
Number of Options Issued 200,000    
Number of Options Exercisable 66,667    
Grant date fair value | $ $ 484,000    
Weighted average remaining contractual life 2 years 9 months 14 days    
Expire January 17, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date January 17, 2025    
Exercise Price | $ / shares $ 4.25    
Number of Options Issued 20,000    
Number of Options Exercisable 6,667    
Grant date fair value | $ $ 56,000    
Weighted average remaining contractual life 2 years 9 months 18 days    
Expire March 29, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date March 29, 2025    
Exercise Price | $ / shares $ 3.88    
Number of Options Issued 54,000    
Number of Options Exercisable 18,000    
Grant date fair value | $ $ 123,660    
Weighted average remaining contractual life 3 years    
Expire May 8, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date May 8, 2025 May 8, 2025  
Exercise Price | $ / shares $ 0.4 $ 0.4  
Number of Options Issued 600,000 600,000  
Number of Options Exercisable 483,333 283,333  
Grant date fair value | $ $ 132,000 $ 132,000  
Weighted average remaining contractual life 3 years 1 month 9 days 4 years 1 month 9 days  
Expire May 16, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date May 16, 2025 May 16, 2025  
Exercise Price | $ / shares $ 0.4 $ 0.4  
Number of Options Issued 100,000 100,000  
Number of Options Exercisable 66,667 33,333  
Grant date fair value | $ $ 24,000 $ 24,000  
Weighted average remaining contractual life 3 years 1 month 17 days 4 years 1 month 17 days  
Expire July 6, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date July 6, 2025 July 6, 2025  
Exercise Price | $ / shares $ 0.68 $ 0.68  
Number of Options Issued 33,334 66,667  
Number of Options Exercisable 0 0  
Grant date fair value | $ $ 13,667 $ 27,333  
Weighted average remaining contractual life 3 years 3 months 7 days 4 years 3 months 7 days  
Expire July 24, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date July 24, 2025 July 24, 2025  
Exercise Price | $ / shares $ 0.63 $ 0.63  
Number of Options Issued 150,000 150,000  
Number of Options Exercisable 100,000 50,000  
Grant date fair value | $ $ 57,000 $ 57,000  
Weighted average remaining contractual life 3 years 3 months 25 days 4 years 3 months 25 days  
Expire October 6, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date October 6, 2025 October 6, 2025  
Exercise Price | $ / shares $ 0.75 $ 0.75  
Number of Options Issued 400,000 400,000  
Number of Options Exercisable 400,000 133,333  
Grant date fair value | $ $ 180,000 $ 180,000  
Weighted average remaining contractual life 3 years 6 months 7 days 4 years 6 months 7 days  
Expire November 24, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date November 24, 2025    
Exercise Price | $ / shares $ 1.77 $ 1.77  
Number of Options Issued 75,000 75,000  
Number of Options Exercisable 75,000 37,500  
Grant date fair value | $ $ 85,500 $ 85,500  
Weighted average remaining contractual life 3 years 7 months 24 days 4 years 7 months 24 days  
Expire December 30, 2025 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date December 30, 2025    
Exercise Price | $ / shares $ 3.32 $ 3.32  
Number of Options Issued 1,000,000 1,000,000  
Number of Options Exercisable 1,000,000 333,333  
Grant date fair value | $ $ 2,150,000 $ 2,150,000  
Weighted average remaining contractual life 3 years 9 months 4 years 9 months  
Expire April 13, 2026 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date April 13, 2026    
Exercise Price | $ / shares $ 1.76    
Number of Options Issued 50,000    
Number of Options Exercisable 16,667    
Grant date fair value | $ $ 58,000    
Weighted average remaining contractual life 4 years 14 days    
Expire December 15, 2026 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date December 15, 2026    
Exercise Price | $ / shares $ 5.2    
Number of Options Issued 25,000    
Number of Options Exercisable 8,333    
Grant date fair value | $ $ 84,750    
Weighted average remaining contractual life 4 years 8 months 15 days    
Expire January 14, 2027 [Member]      
Disclosure of number and weighted average remaining contractual life of outstanding share options [line items]      
Expiry Date January 14, 2027    
Exercise Price | $ / shares $ 4.25    
Number of Options Issued 1,100,000    
Number of Options Exercisable 366,667    
Grant date fair value | $ $ 3,080,000    
Weighted average remaining contractual life 4 years 9 months 14 days