Aptose Biosciences Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Share Capital (Details Textual)

Note 11 - Share Capital (Details Textual) - USD ($)				1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
Note 11 - Share Capital (Details Textual) - USD ($)	Oct. 01, 2023	Sep. 06, 2023	May 25, 2023	Oct. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Aug. 10, 2023	Dec. 09, 2022	Nov. 04, 2021	May 05, 2020
Hanmi Pharmaceuticals Co Ltd [Member]
Proceeds from Issuance of Common Stock		$ 3,000,000
Number of common shares held					884,152		884,152					215,703
Hanmi Pharmaceuticals Co Ltd [Member] \| Common Shares [Member]
Number of shares sold		668,449
Maximum [Member] \| Hanmi Pharmaceuticals Co Ltd [Member]
Investment for ownership interest										$ 7,000,000
Percentage of investment		19.99%								19.99%
Maximum [Member] \| Hanmi Pharmaceuticals Co Ltd [Member] \| Equity Method Investment Second Tranche [Member]
Investment for ownership interest		$ 4,000,000
2023 Committed Equity Facility [Member]
Stock issuance program authorized shares			25,156
Common shares issued (in shares)							328,438
Proceeds from Issuance of Common Stock					$ 1,150,000	$ 0	$ 1,150,000	$ 0
Stock Issuance Program, Authorized Amount			$ 25,000,000
Percentage of common shares outstanding.			19.99%
Shares Issued, Price Per Share (in dollars per share)					$ 3.5		$ 3.5
2023 Committed Equity Facility [Member] \| Subsequent Event [Member]
Common shares issued (in shares)	17,857
Proceeds from Issuance of Common Stock	$ 50,000
2023 Committed Equity Facility [Member] \| Initial Commitment Shares [Member]
Common shares issued (in shares)			7,547				7,547
Proceeds from Issuance of Common Stock							$ 0
Stock Issuance, Percent of Cash Commission to Broker			30.00%
2023 Committed Equity Facility [Member] \| First Back-End Commitment Shares [Member]
Common shares issued (in shares)			7,547
Stock Issuance, Percent of Cash Commission to Broker			30.00%
2023 Committed Equity Facility [Member] \| Second Back-End Commitment Shares [Member]
Common shares issued (in shares)			10,062
Stock Issuance, Percent of Cash Commission to Broker			40.00%
The 2022 ATM Offering [Member]
Common shares issued (in shares)							336,690		4,836
Proceeds from Issuance of Common Stock					$ 694,000	$ 0	$ 1,837,000	$ 0	$ 51,000
Cash proceeds from issuing common shares					$ 1,940,000		$ 1,940,000
Stock Issuance Program, Authorized Amount											$ 50,000,000
Shares Issued, Price Per Share (in dollars per share)					$ 5.62		$ 5.62		$ 10.81
Proceeds from Issuance of Common Stock, Gross							$ 1,900,000		$ 52,000
Stock Issuance, Percent of Cash Commission to Broker					3.00%		3.00%
Cash proceeds from issuing shares							$ 1,828,000
The 2022 ATM Offering [Member] \| Common Shares [Member]
Common shares issued (in shares)							337,000
Cash proceeds from issuing shares							$ 1,828,000
The 2020 ATM Offering [Member]
Common shares issued (in shares)								3,646
Proceeds from Issuance of Common Stock				$ 86,000				$ 50,000
Stock Issuance Program, Authorized Amount													$ 75,000,000
Shares Issued, Price Per Share (in dollars per share)						$ 14.25		$ 14.25
Proceeds from Issuance of Common Stock, Gross				$ 89,000				$ 52,000
Stock Issuance, Percent of Cash Commission to Broker				3.00%