Note 1 - Nature of Operation	9 Months Ended
Dec. 31, 2022
Notes To Financial Statements [Abstract]
Nature Of Operations	1. Nature of operation Acasti Pharma Inc. (“Acasti” or the “Corporation”) is incorporated under the Business Corporations Act (Québec) (formerly Part 1A of the Companies Act (Québec)). The Corporation is domiciled in Canada and its registered office is located at 3009 boul. de la Concorde East, Suite 102, Laval, Québec, Canada H7E 2B5. In August 2021, the Corporation completed the acquisition via a share-for-share merger of Grace Therapeutics, Inc. (“Grace”), a privately held emerging biopharmaceutical company focused on developing innovative drug delivery technologies for the treatment of rare and orphan diseases. The post-merger Corporation is focused on building a late-stage specialty pharmaceutical company specializing in rare and orphan diseases and developing and commercializing products that improve clinical outcomes using our novel drug delivery technologies. The Corporation seeks to apply new proprietary formulations to existing pharmaceutical compounds to achieve enhanced efficacy, faster onset of action, reduced side effects, more convenient delivery and increased patient compliance; all of which could result in improved patient outcomes. The active pharmaceutical ingredients chosen by the Corporation for further development may be already approved in the target indication or could be repurposed for use in new indications. The Corporation has incurred operating losses and negative cash flows from operations in each year since its inception. The Corporation expects to incur significant expenses and continued operating losses for the foreseeable future. The Corporation expects its expenses will increase substantially in connection with its ongoing activities, particularly as it advances clinical development for the first three drug candidates in the Corporation’s pipeline; continues to engage contract manufacturing organizations (“CMO's”) to manufacture its clinical study materials and to ultimately develop large-scale manufacturing capabilities in preparation for commercial launch; seeks regulatory approval for its drug candidates; and adds personnel to support its drug product development and future drug product launch and commercialization. The Corporation does not expect to generate revenue from product sales unless and until it successfully completes drug development and obtains regulatory approval, which the Corporation expects will take several years and is subject to significant uncertainty. To date, the Corporation has financed its operations primarily through public offerings and private placements of its common shares, warrants and convertible debt and the proceeds from research tax credits. Until such time that the Corporation can generate significant revenue from drug product sales, if ever, it will require additional financing, which is expected to be sourced from a combination of public or private equity or debt financing or other non-dilutive sources, which may include fees, milestone payments and royalties from collaborations with third parties. Arrangements with collaborators or others may require the Corporation to relinquish certain rights related to its technologies or drug product candidates. Adequate additional financing may not be available to the Corporation on acceptable terms, or at all. The Corporation’s inability to raise capital as and when needed could have a negative impact on its financial condition and its ability to pursue its business strategy. Management expects the Corporation to have sufficient cash resources to satisfy its objectives into the second quarter of calendar 2024, which is 13 to 16 months from the issuance date of these Financial Statements. The Corporation will require additional capital to fund our daily operating needs beyond that time. The Corporation plans to raise additional capital prior to that time in order to maintain adequate liquidity. Negative results from studies, if any, and depressed prices of the Corporation’s stock could impact the Corporation’s ability to raise additional financing. Raising additional equity capital is subject to market conditions not within the Corporation’s control. If the Corporation does not raise additional funds in this time period, the Corporation may not be able to realize our assets and discharge our liabilities in the normal course of business. The Corporation remains subject to risks similar to other development stage companies in the biopharmaceutical industry, including compliance with government regulations, protection of proprietary technology, dependence on third party contractors and consultants and potential product liability, among others. Reverse stock split On August 26, 2021, the shareholders of the Corporation approved a resolution to undertake a reverse split of the common shares within a range of 1-6 to 1-8 with such specific ratio to be approved by the Acasti Board. All references in these financial statements to number of common shares, warrants and options, price per share and weighted average number of shares outstanding prior to the reverse split have been adjusted to reflect the approved reverse split of 1-8, which was made effective on August 31, 2021, on a retroactive basis as of the earliest period presented.

Note 1 - Nature of Operation

9 Months Ended

Dec. 31, 2022

Notes To Financial Statements [Abstract]

1. Nature of operation

Acasti Pharma Inc. (“Acasti” or the “Corporation”) is incorporated under the Business Corporations Act (Québec) (formerly Part 1A of the Companies Act (Québec)). The Corporation is domiciled in Canada and its registered office is located at 3009 boul. de la Concorde East, Suite 102, Laval, Québec, Canada H7E 2B5.

In August 2021, the Corporation completed the acquisition via a share-for-share merger of Grace Therapeutics, Inc. (“Grace”), a privately held emerging biopharmaceutical company focused on developing innovative drug delivery technologies for the treatment of rare and orphan diseases. The post-merger Corporation is focused on building a late-stage specialty pharmaceutical company specializing in rare and orphan diseases and developing and commercializing products that improve clinical outcomes using our novel drug delivery technologies. The Corporation seeks to apply new proprietary formulations to existing pharmaceutical compounds to achieve enhanced efficacy, faster onset of action, reduced side effects, more convenient delivery and increased patient compliance; all of which could result in improved patient outcomes. The active pharmaceutical ingredients chosen by the Corporation for further development may be already approved in the target indication or could be repurposed for use in new indications.

The Corporation has incurred operating losses and negative cash flows from operations in each year since its inception. The Corporation expects to incur significant expenses and continued operating losses for the foreseeable future. The Corporation expects its expenses will increase substantially in connection with its ongoing activities, particularly as it advances clinical development for the first three drug candidates in the Corporation’s pipeline; continues to engage contract manufacturing organizations (“CMO's”) to manufacture its clinical study materials and to ultimately develop large-scale manufacturing capabilities in preparation for commercial launch; seeks regulatory approval for its drug candidates; and adds personnel to support its drug product development and future drug product launch and commercialization.

The Corporation does not expect to generate revenue from product sales unless and until it successfully completes drug development and obtains regulatory approval, which the Corporation expects will take several years and is subject to significant uncertainty. To date, the Corporation has financed its operations primarily through public offerings and private placements of its common shares, warrants and convertible debt and the proceeds from research tax credits. Until such time that the Corporation can generate significant revenue from drug product sales, if ever, it will require additional financing, which is expected to be sourced from a combination of public or private equity or debt financing or other non-dilutive sources, which may include fees, milestone payments and royalties from collaborations with third parties. Arrangements with collaborators or others may require the Corporation to relinquish certain rights related to its technologies or drug product candidates. Adequate additional financing may not be available to the Corporation on acceptable terms, or at all. The Corporation’s inability to raise capital as and when needed could have a negative impact on its financial condition and its ability to pursue its business strategy.

Management expects the Corporation to have sufficient cash resources to satisfy its objectives into the second quarter of calendar 2024, which is 13 to 16 months from the issuance date of these Financial Statements. The Corporation will require additional capital to fund our daily operating needs beyond that time. The Corporation plans to raise additional capital prior to that time in order to maintain adequate liquidity. Negative results from studies, if any, and depressed prices of the Corporation’s stock could impact the Corporation’s ability to raise additional financing. Raising additional equity capital is subject to market conditions not within the Corporation’s control. If the Corporation does not raise additional funds in this time period, the Corporation may not be able to realize our assets and discharge our liabilities in the normal course of business.

The Corporation remains subject to risks similar to other development stage companies in the biopharmaceutical industry, including compliance with government regulations, protection of proprietary technology, dependence on third party contractors and consultants and potential product liability, among others.

Reverse stock split

On August 26, 2021, the shareholders of the Corporation approved a resolution to undertake a reverse split of the common shares within a range of 1-6 to 1-8 with such specific ratio to be approved by the Acasti Board. All references in these financial statements to number of common shares, warrants and options, price per share and weighted average number of shares outstanding prior to the reverse split have been adjusted to reflect the approved reverse split of 1-8, which was made effective on August 31, 2021, on a retroactive basis as of the earliest period presented.