Annual reports filed by certain Canadian issuers pursuant to Section 15(d) and Rule 15d-4

Document And Entity Information

Document And Entity Information
12 Months Ended
Dec. 31, 2017
Document Information [Line Items]  
Entity Registrant Name Aptose Biosciences Inc.
Entity Central Index Key 0000882361
Trading Symbol apto
Current Fiscal Year End Date --12-31
Entity Filer Category Non-accelerated Filer
Entity Current Reporting Status Yes
Entity Voluntary Filers No
Entity Well-known Seasoned Issuer No
Entity Common Stock, Shares Outstanding (in shares) 27,502,053
Document Type 40-F
Document Period End Date Dec. 31, 2017
Document Fiscal Year Focus 2017
Document Fiscal Period Focus FY
Amendment Flag false