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Equity (Narrative) (Details)
 12 Months Ended
Mar. 31, 2021
CAD ($)
Share
$ / shares
shares
Mar. 31, 2021
USD ($)
Share
shares
Mar. 31, 2020
CAD ($)
Share
$ / shares
Mar. 31, 2020
USD ($)
Share
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of common shares issued in acquisition of Quebec Inc. | shares 15,000,000 15,000,000    
Value of common shares issued in acquisition of Quebec Inc. $ 3,450,000 $ 2,458,470    
Number of common shares issued to a contractor in exchange for services | shares 100,000 100,000    
Value of common shares issued to a contractor in exchange for services $ 22,875 $ 24,448    
Number of common shares issued pursuant to vesting of restricted share units | shares 1,626,000 1,626,000    
Value of common shares issued pursuant to vesting of restricted share units | $   $ 584,244    
Amount reallocated from reserves to share capital in connection with vesting of restricted share units | $   $ 241,502    
Number of share options exercised in share-based payment arrangement 7,476,972 7,476,972 1,469,938 1,469,938
Value of common shares issued for options exercised $ 4,673,819 $ 3,779,887 $ 440,981 $ 329,323
Proceeds from exercise of options | $   1,803,432   329,323
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares $ 0.63   $ 0.30  
Amount reallocated from reserves to share capital in connection with exercise of options | $   $ 2,056,713   $ 186,164
Shares reserved for issuance under stock option plan, maximum percentage of total issued and outstanding shares 10.00% 10.00%    
Maximum percentage of yearly shares issuable to any one optionee under stock option plan 5.00% 5.00%    
Description of vesting requirements Options granted to Consultants performing Investor Relations activities shall vest over a minimum of 12 months with no more than 1/4 of such options vesting in any 3-month period. All other options vest at the discretion of the Board of Directors. Options granted to Consultants performing Investor Relations activities shall vest over a minimum of 12 months with no more than 1/4 of such options vesting in any 3-month period. All other options vest at the discretion of the Board of Directors.    
Number of common shares issued in ATM Equity Program | shares 16,363,500 16,363,500    
Proceeds from common shares issued in ATM Equity Program $ 81,726,582 $ 64,543,080    
Average price per ATM Share | $ / shares $ 4.99      
Cash commission paid in Equity Distribution Agreement | $   $ 1,842,480    
Maximum term of options granted 10 years 10 years    
Number of stock options granted 1,138,000 1,138,000 3,000,000 3,000,000
Number of warrants granted in Norway Acquisition | shares 1,250,000 1,250,000    
Number of warrants vesting upon receipt of all regulatory permits required to commence construction | shares 400,000 400,000    
Number of warrants vesting upon commencement of the mining of digital currency or other revenue generating activity | shares 450,000 450,000    
Share-based compensation | $   $ 1,654,346   $ 686,659
Stock option 1 [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of share options exercised in share-based payment arrangement 187,500 187,500    
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares $ 0.29      
Stock option 2 [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of share options exercised in share-based payment arrangement 5,625,000 5,625,000    
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares $ 0.30      
Stock option 3 [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of share options exercised in share-based payment arrangement 300,000 300,000    
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares $ 0.62      
Stock option 4 [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of share options exercised in share-based payment arrangement 1,344,472 1,344,472    
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares $ 2.00      
Stock option 5 [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of share options exercised in share-based payment arrangement 20,000 20,000    
Weighted average exercise price of share options exercised in share-based payment arrangement | $ / shares $ 2.85      
Stock option [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Share-based compensation | $   $ 936,127   524,953
Restricted share units [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of other equity instruments vested 1,626,000 1,626,000    
Shares reserved for issuance under restricted share unit plan, maximum percentage of total issued and outstanding shares 10.00% 10.00%    
Maximum percentage of yearly shares issuable to any one optionee under restricted share unit plan 5.00% 5.00%    
Maximum number of shares authorized in share-based arrangment | shares 10,000,000 10,000,000    
Share-based compensation | $   $ 718,219   $ 161,706
Number of other equity instruments granted 310,000 310,000 3,100,000 3,100,000
Common shares issuance in ATM Program during subsequent period [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of common shares issued in ATM Equity Program | shares 6,897,700 6,897,700    
Proceeds from common shares issued in ATM Equity Program $ 26,808,163 $ 21,484,385    
Average price per ATM Share | $ / shares $ 3.94      
Cash commission paid in Equity Distribution Agreement | $   $ 644,532    
Options granted in subsequent period [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of share options exercised in share-based payment arrangement 215,577 215,577    
Proceeds from exercise of options | $ $ 303,654      
Options granted in subsequent period [Member] | Expiring April 6, 2031 [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of stock options granted 175,000 175,000    
Exercise price, share options granted | $ / shares $ 5.03      
Options granted in subsequent period [Member] | Expiring April 29, 2031 [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of stock options granted 550,000 550,000    
Exercise price, share options granted | $ / shares $ 3.67      
Options granted in subsequent period [Member] | Expiring June 4, 2026 [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of stock options granted 50,000 50,000    
Exercise price, share options granted | $ / shares $ 2.99      
Restricted share-units granted in subsequent period [Member] | Restricted share units [Member]        
Disclosure of terms and conditions of share-based payment arrangement [Line Items]        
Number of other equity instruments granted 517,500 517,500