v3.22.2.2
Cover
Dec. 06, 2022
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 06, 2022
Entity File Number 001-38899
Entity Registrant Name MILESTONE PHARMACEUTICALS INC.
Entity Central Index Key 0001408443
Entity Tax Identification Number 00-0000000
Entity Incorporation, State or Country Code A8
Entity Address, Address Line One 1111 Dr. Frederik-Philips Boulevard
Entity Address, Address Line Two Suite 420
Entity Address, City or Town Montréal
Entity Address, State or Province QC
Entity Address, Country CA
Entity Address, Postal Zip Code H4M 2X6
City Area Code 514
Local Phone Number 336-0444
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Shares
Trading Symbol MIST
Security Exchange Name NASDAQ
Entity Emerging Growth Company true
Elected Not To Use the Extended Transition Period true