Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
May 31, 2020
May 31, 2019
Cash Flows from Operating Activities    
Net loss $ (3,852,714) $ (3,554,550)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization (Notes 5 and 6) 256,090 164,336
Stock-based compensation expense (Note 13) 1,011,824 930,690
Accrued interest expenses (Note 10) 9,416 117,433
Loss on revaluation of warrants 0 8,483
Debt accretion (Note 10) 8,547 583,727
Deferred financing expenses 0 46,442
Gain on conversion of convertible notes 0 (268,730)
Loss on revaluation of foreign exchange contracts 98,502 0
Changes in operating assets and liabilities:    
Sales tax and tax credits receivable (Note 3) 76,410 (158,954)
Prepaid expenses (Note 4) (1,865,216) 49,136
Accounts payable and accrued liabilities (Note 8) (720,759) (5,366)
Net cash used in operating activities (4,977,900) (2,087,353)
Cash Flows from Investing Activities    
Investment in a joint venture (Note 9) (650,000) (500,000)
Additions to property, plant and equipment (Note 5) (394,403) (470,545)
Additions to intangible assets (Note 6) (144,386) (24,811)
Net cash used in investing activities (1,188,789) (955,356)
Cash Flows from Financing Activities    
Proceeds from sale of common shares 0 5,130,000
Share issuance costs 0 (863,216)
Repayment of long-term debt (Note 10) (12,693) (13,057)
Net cash (used) provided by financing activities (12,693) 4,253,727
Effect of exchange rate changes (29,534) (32,796)
Net decrease in cash (6,208,916) 1,138,222
Cash, beginning of period 33,717,671 5,833,390
Cash, end of period 27,508,755 6,971,612
Supplemental Disclosure of Cash Flow Information:    
Income tax paid 0 0
Interest paid 10,311 14,488
Interest received $ 40,346 $ 0