Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information
12 Months Ended
Mar. 31, 2018
Document Information [Line Items]  
Entity Registrant Name Acasti Pharma Inc.
Entity Central Index Key 0001444192
Trading Symbol acst
Current Fiscal Year End Date --03-31
Entity Filer Category Smaller Reporting Company
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Well-known Seasoned Issuer No
Entity Common Stock, Shares Outstanding (in shares) 25,638,215
Document Type 20-F
Document Period End Date Mar. 31, 2018
Document Fiscal Year Focus 2018
Document Fiscal Period Focus FY
Amendment Flag false