Aptose Biosciences Inc. Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Note 17 - Subsequent Events (Details Textual)

Note 17 - Subsequent Events (Details Textual) - $ / shares		12 Months Ended
	Jan. 01, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		6,362,000	2,160,000
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)		$ 6.81	$ 2
Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		5,200,000	1,665,000
Options with Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		862,000	160,000
Share-based Payment Arrangement, Tranche One [Member] \| Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		50.00%	50.00%
Share-based Payment Arrangement, Tranche One [Member] \| Options with Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		50.00%	50.00%
Share-based Payment Arrangement, Tranche Two [Member] \| Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		16.67%	16.67%
Share-based Payment Arrangement, Tranche Two [Member] \| Options with Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%	25.00%
Share-based Payment Arrangement, Tranche Three [Member] \| Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		16.67%	16.67%
Share-based Payment Arrangement, Tranche Three [Member] \| Options with Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%	25.00%
Share-based Payment Arrangement, Tranche Four [Member] \| Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		16.67%	16.67%
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	2,746,750
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in dollars per share)	$ 4.36
Subsequent Event [Member] \| Options with Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)	430,000
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche One [Member] \| Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	50.00%
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche One [Member] \| Options with Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	50.00%
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche Two [Member] \| Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	16.67%
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche Two [Member] \| Options with Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche Three [Member] \| Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	16.67%
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche Three [Member] \| Options with Three Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%
Subsequent Event [Member] \| Share-based Payment Arrangement, Tranche Four [Member] \| Options with Four Year Vesting [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	16.67%