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Note 8 - Capital Shares (Details Textual) - USD ($) $ / shares in Units, Pure in Thousands				1 Months Ended	7 Months Ended	12 Months Ended
	Oct. 04, 2024	Sep. 30, 2024	Nov. 02, 2022	Nov. 30, 2022	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Oct. 31, 2024	Aug. 31, 2024	Mar. 31, 2023	Mar. 27, 2023	Sep. 30, 2022	Aug. 31, 2022
Stock Issued During Period, Value, New Issues						$ 729,387
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 21.74			$ 19.51	$ 21.74	$ 19.51					$ 28
Equity Offering, Maximum Amount													$ 150,000,000
Class of Warrant or Right, Outstanding, Weighted Average Remaining Contractual Term						29 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period						0	0
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value		$ 200				$ 200
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term						80 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price		$ 27.55				$ 27.55
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Per Share		$ 66				$ 66
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term						76 months
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Number of Shares		54,652				54,652
Share-Based Compensation Arrangement by Share-Based Payment Award, Option, Nonvested, Weighted Average Exercise Price		$ 9.24				$ 9.24
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Intrinsic Value Per Share		$ 134				$ 134
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested, Weighted Average Remaining Contractual Term						102 months
Share-Based Payment Arrangement, Expense						$ 500,000	$ 1,200,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount		$ 100,000				$ 100,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition						24 months
The 2019 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized		642,737				642,737
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant		141,099				141,099
Share-Based Payment Arrangement, Option [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term						5 years	5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period						10 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate						0.00%	0.00%
Share-Based Payment Arrangement, Option [Member] | The 2019 Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period		10 years
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		$ 0				$ 0
Canaccord [Member]
Stock Issued During Period, Shares, New Issues					171,916
Stock Issued During Period, Value, New Issues					$ 700,000
Equity Offering, Maximum Amount									$ 20,000,000	$ 20,000,000
Equity Offering, Limitation Amount									$ 8,400,000	$ 8,400,000
Class A Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			192,248
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 10.5
Warrants and Rights Outstanding, Maturity Date			Dec. 23, 2025
Class B Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)			192,248
Class of Warrant or Right, Exercise Price of Warrants or Rights			$ 7
Warrants and Rights Outstanding, Maturity Date			Dec. 23, 2023
Warrants Issued in Private Placement [Member]
Warrants and Rights Outstanding			$ 1,200,000
Private Placement [Member]
Stock Issued During Period, Shares, New Issues			384,475	384,475
Proceeds from Issuance or Sale of Equity			$ 2,900,000	$ 3,000,000
Stock Issued During Period, Value, New Issues			$ 2,700,000
Equity Distribution Agreement [Member] | Canaccord [Member]
Stock Issued During Period, Shares, New Issues						171,916	196,401
Stock Issued During Period, Value, New Issues						$ 700,000	$ 1,300,000
Equity Offering, Maximum Amount											$ 20,000,000
Equity Offering, Limitation Amount											$ 8,400,000
At The Market Offering Agreement [Member] | Subsequent Event [Member]
Stock Issued During Period, Shares, New Issues	220,269
Stock Issued During Period, Value, New Issues	$ 600,000
Equity Offering, Maximum Amount	$ 3,870,000							$ 3,870,000

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