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Note 16 - Income Taxes - Components of Income Tax Provision (Details) - USD ($)
12 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Loss before income taxes $ (14,817,818) $ (14,616,067)
Corporate tax rate 21.83% 21.72%
Expected tax recovery $ (3,234,730) $ (3,174,610)
Foreign tax rate differences 77,454 85,796
Permanent differences (217,615) 170,023
Prior year true-up (270,078) 117,800
Change in state tax rate (405,826) (553,365)
Foreign exchange rate differences (55,666) 17,456
Other 162,812 71,805
Change in valuation allowance 3,939,641 3,233,427
Tax adjustment from operations (4,008) (31,668)
Unrealized loss, other comprehensive loss 26,117
Deferred tax benefits $ (4,008) $ (5,551)