v3.25.2
Cover
Aug. 29, 2025
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Aug. 29, 2025
Entity File Number 001-37347
Entity Registrant Name XBIOTECH INC.
Entity Central Index Key 0001626878
Entity Incorporation, State or Country Code A1
Entity Address, Address Line One 5217 Winnebago Ln
Entity Address, City or Town Austin
Entity Address, State or Province TX
Entity Address, Postal Zip Code 78744
City Area Code (512)
Local Phone Number 386-2900
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, no par value
Trading Symbol XBIT
Security Exchange Name NASDAQ
Entity Emerging Growth Company false