Note 6 - Capital Shares (Details Textual)				3 Months Ended			9 Months Ended
	Aug. 01, 2025 shares	Feb. 12, 2025 USD ($) $ / shares shares	Oct. 30, 2024 USD ($) $ / shares Rate shares	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares shares	Oct. 31, 2024 USD ($)	Sep. 30, 2024 $ / shares	Sep. 30, 2023 $ / shares
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares				$ 15.35	$ 21.74		$ 15.35	$ 21.74		$ 21.74	$ 19.51
Class of Warrant or Right, Issued During Period							326,560
Stock Issued During Period, Value, New Issues | $					$ 138,421		$ 7,497,133	$ 729,387
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term								5 years
Class of Warrant or Right, Outstanding, Weighted Average Remaining Contractual Term							31 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross								500
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term							72 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price | $ / shares				25.93			$ 25.93
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Per Share | $ / shares				$ 0			$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term							72 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares				25,617			25,617
Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price | $ / shares				$ 7			$ 7
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Intrinsic Value Per Share | $ / shares				$ 0			$ 0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Remaining Contractual Term							95 months
Share-Based Payment Arrangement, Expense | $				$ 200,000	$ 100,000		$ 300,000	$ 400,000
Share-Based Payment Arrangement, Nonemployee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross				0	0			0
Share-Based Payment Arrangement, Employee [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross					500		0	500
The 2019 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized				2,367,737			2,367,737
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant				668,398			668,398
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term							5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period						10 years	10 years
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $				$ 10,000.00			$ 10,000.00
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition							15 months
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period							10 years
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $				$ 2,200,000			$ 2,200,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition							35 months
Chief Executive Officer, Secretary, and Director [Member] | Warrant Shares [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ / shares			$ 3.445
Class of Warrant or Right, Issued During Period			326,560
Warrants and Rights Outstanding, Term			5 years
Class of Warrant or Right, Maximum Beneficial Ownership | Rate			19.99%
H.C. Wainwright & Co., LLC [Member]
Stock Issued During Period, Shares, New Issues							304,057
Equity Offering, Maximum Amount | $									$ 3,870,000
Stock Issued During Period, Value, New Issues | $							$ 800,000
Payments of Stock Issuance Costs | $							25,000
H.C. Wainwright & Co., LLC [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues	0
February 2025 Series B-1 Purchase Agreement [Member]
Proceeds from Issuance or Sale of Equity | $		$ 15,000,000					15,000,000
October 2024 SPA [Member] | Chief Executive Officer, Secretary, and Director [Member]
Proceeds from Issuance or Sale of Equity | $			$ 1,540,819				$ 1,500,000
Equity Offering, Maximum Amount | $			$ 5,000,000
Units Issued, Percentage of Underlying Conversion Shares			75.00%
Units Issued, Combined Purchase Price | $ / shares			$ 10,272.13
Equity Offering, Maximum Without Approval | $			$ 0.02
Series B-1 Preferred Stock [Member] | February 2025 Series B-1 Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues		834
Preferred Stock, Par or Stated Value Per Share | $ / shares		$ 10,000
Preferred Stock, Convertible, Conversion Ratio		5,208
Preferred Stock, Convertible, Conversion Price | $ / shares		$ 1.92
Shares Issued, Price Per Share | $ / shares		$ 10,000
Common Stock [Member] | February 2025 Series B-1 Purchase Agreement [Member]
Stock Issued During Period, Shares, New Issues		3,468,746
Shares Issued, Price Per Share | $ / shares		$ 1.92
Series A-1 Preferred Stock [Member] | October 2024 SPA [Member] | Chief Executive Officer, Secretary, and Director [Member]
Stock Issued During Period, Shares, New Issues			150
Preferred Stock, Par or Stated Value Per Share | $ / shares			$ 10,000
Preferred Stock, Convertible, Conversion Ratio			2,903
Preferred Stock, Convertible, Conversion Price | $ / shares			$ 3.445
Equity Offering, Maximum Amount | $			$ 5,000,000
Preferred Stock, Convertible, Shares Issuable			435,414
Preferred Stock, Convertible, Maximum Beneficial Ownership			19.99%
Preferred Stock, Dividend Rate, Percentage			10.00%