Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 9 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Cash Flows from Operating Activities    
Net loss $ (10,747,492) $ (9,981,702)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 585,367 366,710
Stock-based compensation expense (Note 12) 2,610,811 3,162,045
Accrued interest (Note 10) 313,433 0
Loss on revaluation of warrants (Note 10) 8,483 0
Debt accretion (Note 10) 1,584,977 0
Deferred financing costs (Note 10) 86,212 0
Gain on conversion of convertible notes (Note 10) (232,565) 0
Loss on revaluation of foreign exchange contracts 10,881 0
Changes in operating assets and liabilities:    
Sales tax and tax credits receivable (37,536) 67,606
Prepaid expenses 52,649 446,770
Accounts payable and accrued liabilities (1,054,967) 483,254
Net cash used in operating activities (6,819,748) (5,455,317)
Cash Flows from Investing Activities    
Investment in a joint venture (Note 8) (850,000) 0
Additions to property, plant and equipment (Note 4) (1,647,433) (1,428,174)
Additions to intangible assets (Note 5) (95,488) (95,179)
Net cash used in investing activities (2,592,921) (1,523,353)
Cash Flows from Financing Activities    
Proceeds from sale of common shares (Note 11) 40,273,751 0
Share issuance costs (Note 11) (1,106,370) 0
Proceeds from issuance of convertible debt 0 2,450,000
Convertible debt subscriptions 0 100,000
Repayment of long-term debt (Note 9) (39,506) (39,471)
Net cash provided from (used in) financing activities 39,127,875 2,510,529
Effect of exchange rate changes (57,105) (53,314)
Net change in cash and cash equivalents 29,658,101 (4,521,455)
Cash and cash equivalents, beginning of period 5,833,390 8,149,713
Cash and cash equivalents, end of period 35,491,491 3,628,258
Supplemental Disclosure of Cash Flow Information:    
Income tax paid 0 0
Interest paid 45,668 41,442
Interest received $ 363,565 $ 325