Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Cash Flows from Operating Activities    
Net loss $ (20,549,780) $ (8,980,438)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization (Notes 6 and 7) 272,770 558,561
Stock-based compensation expense (Note 16) 719,733 1,877,754
Accretion and accrued interest expenses (Note 19) 43,967 36,949
Loss on revaluation of foreign exchange contracts (Note 19) 0 11,482
Changes in operating assets and liabilities:    
Sales tax and tax credits receivable (Note 3) 436,236 169,018
Prepaid expenses (Note 4) (365,769) (824,675)
Accounts payable and accrued liabilities (Note 9) (2,957,577) (304,438)
Net cash used in operating activities (22,400,420) (7,455,787)
Cash Flows from Investing Activities    
Investment in joint venture (Note 10) 0 (650,000)
Deposits on machinery and equipment (Note 4) 0 (1,305,010)
Additions to property, plant and equipment (Notes 5 and 6) (5,010,982) (1,116,744)
Additions to intangible assets (Note 7) (90,591) (160,484)
Net cash used in investing activities (5,101,573) (3,232,238)
Cash Flows from Financing Activities    
Proceeds from sale of common shares and warrants, net of share issuance costs (Note 13) 56,087,746 0
Proceeds from issuance of long-term debt (Note 11) 1,894,877 0
Repayment of long-term debt (Note 11) (27,740) (26,836)
Net cash (used) provided by financing activities 57,954,883 (26,836)
Effect of exchange rate changes (113,479) 125,433
Net increase (decrease) in cash 30,339,411 (10,589,428)
Cash, beginning of period 35,221,951 33,717,671
Cash, end of period 65,561,362 23,128,243
Supplemental Disclosure of Cash Flow Information:    
Income tax paid 0 0
Interest paid 19,720 19,441
Interest received $ 18,174 $ 30,497