Note 2 - Summary of Significant Accounting Policies	9 Months Ended
Dec. 31, 2021
Notes To Financial Statements [Abstract]
Significant Accounting Policies [Text Block]	2. Summary of significant accounting policies: Basis of presentation These unaudited Consolidated Interim Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and on a basis consistent with those accounting principles followed by the Corporation and disclosed in note 2 of its most recent Annual Consolidated Financial Statements, except as disclosed in note 3 – Recent accounting pronouncements and policies and note 4 Acquisition of Grace, and should be read in conjunction with such statements and notes thereto. Use of estimates The preparation of these financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income, and expenses. Actual results may differ from these estimates. Estimates are based on management’s best knowledge of current events and actions that management may undertake in the future. Estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognized in the period in which the estimates are revised and in any future periods affected. Estimates and assumptions include the measurement of derivative warrant liabilities (note 8), stock-based compensation (note 12), assets held for sale (note 5), supply agreement (note 15), acquisition of Grace and valuation of intangibles (note 4). Estimates and assumptions are also involved in measuring the accrual of services rendered with respect to research and development expenditures at each reporting date, including whether contingencies should be accrued for, as well as in determining which research and development expenses qualify for investment tax credits and in what amounts. The Corporation recognizes the tax credits once it has reasonable assurance that they will be realized. Recorded tax credits are subject to review and approval by tax authorities and, therefore, could be different from the amounts recorded. Intangible assets - acquired in-process research and development In a business combination, the fair value of in-process research and development (“IPR&D”) acquired is capitalized and accounted for as indefinite-lived intangible assets, and not amortized until the underlying project receives regulatory approval, at which point the intangible assets will be accounted for as definite-lived intangible assets and amortized over the remaining useful life or discontinued. If discontinued, the intangible asset will be written off. Research and development (“R&D”) costs incurred after the acquisition are expensed as incurred. The estimated fair values of identifiable intangible assets were determined using the "income approach" which is a valuation technique that provides an estimate of the fair value of an asset based on market participant expectations of the cash flows an asset would generate over its remaining useful life. Some of the assumptions inherent in the development of these asset valuations include the estimated net cash flows for each year for the asset (including net revenues, cost of products sold, R&D costs, and selling and marketing costs), the appropriate discount rate necessary to measure the risk inherent in each future cash flow stream, the life cycle of each asset, the potential regulatory and commercial success risk, competitive trends impacting the asset and each cash flow stream, as well as other factors. Indefinite-lived assets are not amortized but are subject to an impairment review annually and more frequently when indicators of impairment exist. An impairment of indefinite-lived intangible assets would occur if the fair value of the intangible asset is less than the carrying value. The Corporation tests indefinite-lived intangible assets for impairment by first assessing qualitative factors to determine whether it is more likely than not that the fair value is less than its carrying amount. If the Corporation concludes it is more likely than not that the fair value is less than it's carrying amount, a quantitative impairment test is performed. For its quantitative impairment tests, the Corporation uses an estimated future cash flow approach that requires judgment with respect to estimated net cash flows for each year for the asset (including net revenues, cost of products sold, R&D costs, and selling and marketing costs), the appropriate discount rate necessary to measure the risk inherent in each future cash flow stream, the life cycle of each asset, the potential regulatory and commercial success risk, competitive trends impacting the asset and each cash flow stream, as well as other factors. The use of alternative estimates and assumptions could increase or decrease the estimated fair value of the assets and potentially result in different impacts to the Corporation's results of operations.

Note 2 - Summary of Significant Accounting Policies

9 Months Ended

Dec. 31, 2021

Notes To Financial Statements [Abstract]

Significant Accounting Policies [Text Block]

2. Summary of significant accounting policies:

Basis of presentation

These unaudited Consolidated Interim Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and on a basis consistent with those accounting principles followed by the Corporation and disclosed in note 2 of its most recent Annual Consolidated Financial Statements, except as disclosed in note 3 – Recent accounting pronouncements and policies and note 4 Acquisition of Grace, and should be read in conjunction with such statements and notes thereto.

Use of estimates

The preparation of these financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, income, and expenses. Actual results may differ from these estimates.

Estimates are based on management’s best knowledge of current events and actions that management may undertake in the future. Estimates and underlying assumptions are reviewed on an ongoing basis. Revisions to accounting estimates are recognized in the period in which the estimates are revised and in any future periods affected.

Estimates and assumptions include the measurement of derivative warrant liabilities (note 8), stock-based compensation (note 12), assets held for sale (note 5), supply agreement (note 15), acquisition of Grace and valuation of intangibles (note 4). Estimates and assumptions are also involved in measuring the accrual of services rendered with respect to research and development expenditures at each reporting date, including whether contingencies should be accrued for, as well as in determining which research and development expenses qualify for investment tax credits and in what amounts. The Corporation recognizes the tax credits once it has reasonable assurance that they will be realized. Recorded tax credits are subject to review and approval by tax authorities and, therefore, could be different from the amounts recorded.

Intangible assets - acquired in-process research and development

In a business combination, the fair value of in-process research and development (“IPR&D”) acquired is capitalized and accounted for as indefinite-lived intangible assets, and not amortized until the underlying project receives regulatory approval, at which point the intangible assets will be accounted for as definite-lived intangible assets and amortized over the remaining useful life or discontinued. If discontinued, the intangible asset will be written off. Research and development (“R&D”) costs incurred after the acquisition are expensed as incurred.

The estimated fair values of identifiable intangible assets were determined using the "income approach" which is a valuation technique that provides an estimate of the fair value of an asset based on market participant expectations of the cash flows an asset would generate over its remaining useful life. Some of the assumptions inherent in the development of these asset valuations include the estimated net cash flows for each year for the asset (including net revenues, cost of products sold, R&D costs, and selling and marketing costs), the appropriate discount rate necessary to measure the risk inherent in each future cash flow stream, the life cycle of each asset, the potential regulatory and commercial success risk, competitive trends impacting the asset and each cash flow stream, as well as other factors.

Indefinite-lived assets are not amortized but are subject to an impairment review annually and more frequently when indicators of impairment exist. An impairment of indefinite-lived intangible assets would occur if the fair value of the intangible asset is less than the carrying value.

The Corporation tests indefinite-lived intangible assets for impairment by first assessing qualitative factors to determine whether it is more likely than not that the fair value is less than its carrying amount. If the Corporation concludes it is more likely than not that the fair value is less than it's carrying amount, a quantitative impairment test is performed. For its quantitative impairment tests, the Corporation uses an estimated future cash flow approach that requires judgment with respect to estimated net cash flows for each year for the asset (including net revenues, cost of products sold, R&D costs, and selling and marketing costs), the appropriate discount rate necessary to measure the risk inherent in each future cash flow stream, the life cycle of each asset, the potential regulatory and commercial success risk, competitive trends impacting the asset and each cash flow stream, as well as other factors. The use of alternative estimates and assumptions could increase or decrease the estimated fair value of the assets and potentially result in different impacts to the Corporation's results of operations.