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Significant accounting policies (Details)
12 Months Ended
Dec. 31, 2020
Computer equipment [Member]  
Statement Line Items [Line Items]  
Depreciation rate 30%
Computer equipment – Bitcoin rigs [Member]  
Statement Line Items [Line Items]  
Depreciation rate 75%
Furniture and fixtures [Member]  
Statement Line Items [Line Items]  
Depreciation rate 20%
Leasehold improvements [Member]  
Statement Line Items [Line Items]  
Depreciation rate Term of lease