Note 10 - Related Party Transactions (Details Textual)			1 Months Ended	3 Months Ended		9 Months Ended
	Feb. 12, 2025 USD ($) $ / shares shares	Oct. 30, 2024 USD ($) $ / shares shares	Oct. 31, 2023 USD ($)	Jun. 30, 2025 USD ($) $ / shares	Jun. 30, 2024 USD ($) $ / shares	Jun. 30, 2025 USD ($) $ / shares shares	Jun. 30, 2024 USD ($) $ / shares	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
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]			Base Rate [Member]
Revolving Credit Facility [Member] | Pardeep Nijhawan Medicine Professional Corporation [Member]
Line of Credit Facility, Maximum Borrowing Capacity | $			$ 10,000,000
Debt Instrument, Basis Spread on Variable Rate			3.00%
Debt Instrument, Covenant, Maximum Percentage of Borrowing Base for Outstanding Principal			85.00%
Line of Credit Facility, Commitment Fee Amount | $				$ 0	$ 4,000	$ 13,000	$ 38,000
Unsecured Line of Credit [Member] | Pardeep Nijhawan Medicine Professional Corporation [Member]
Line of Credit Facility, Maximum Borrowing Capacity | $			$ 3,500,000
Chief Executive Officer [Member]
Operating Lease, Expense | $				$ 20,000	$ 20,000	60,000	$ 60,000
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
February 2025 Series B-1 Purchase Agreement [Member]
Proceeds from Issuance or Sale of Equity | $	$ 15,000,000					15,000,000
February 2025 Series B-1 Purchase Agreement [Member] | Series B-1 Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues	834
Preferred Stock, Convertible, Conversion Ratio	5,208
Preferred Stock, Convertible, Conversion Price | $ / shares	$ 1.92
Shares Issued, Price Per Share | $ / shares	$ 10,000
February 2025 Series B-1 Purchase Agreement [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues	3,468,746
Shares Issued, Price Per Share | $ / shares	$ 1.92
February 2025 Series B-1 Purchase Agreement [Member] | CEO, Secretary, Directors, Velan, Stonepine, Nantahala, and Rubric [Member] | Series B-1 Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues	834
Preferred Stock, Convertible, Conversion Ratio	5,208
Preferred Stock, Convertible, Conversion Price | $ / shares	$ 1.92
Shares Issued, Price Per Share | $ / shares	$ 10,000
Preferred Stock, Convertible, Maximum Beneficial Ownership	4.99%
Preferred Stock, Convertible, Maximum Beneficial Ownership at Option of Holder	9.99%
Preferred Stock, Convertible, Maximum Beneficial Ownership at Option of Holder Given 61 Days Notice	19.99%
February 2025 Series B-1 Purchase Agreement [Member] | CEO, Secretary, Directors, Velan, Stonepine, Nantahala, and Rubric [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues	3,468,746
Shares Issued, Price Per Share | $ / shares	$ 1.92
February 2025 Series B-1 Purchase Agreement [Member] | Chief Executive Officer [Member] | Series B-1 Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues	100
Proceeds from Issuance or Sale of Equity | $	$ 1,000,000
February 2025 Series B-1 Purchase Agreement [Member] | Patrick Marshall [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues	41,666
Proceeds from Issuance or Sale of Equity | $	$ 80,000
February 2025 Series B-1 Purchase Agreement [Member] | Carlo Sistilli [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues	10,416
Proceeds from Issuance or Sale of Equity | $	$ 20,000
February 2025 Series B-1 Purchase Agreement [Member] | Beneficial Owner [Member]
Proceeds from Issuance or Sale of Equity | $	$ 12,500,000
February 2025 Series B-1 Purchase Agreement [Member] | Beneficial Owner [Member] | Series B-1 Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues	734
February 2025 Series B-1 Purchase Agreement [Member] | Beneficial Owner [Member] | Common Stock [Member]
Stock Issued During Period, Shares, New Issues	2,687,500
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
October 2024 SPA [Member] | Chief Executive Officer, Secretary, and Director [Member] | Series A-1 Preferred Stock [Member]
Stock Issued During Period, Shares, New Issues		150
Preferred Stock, Convertible, Conversion Ratio		2,903
Preferred Stock, Convertible, Conversion Price | $ / shares		$ 3.445
Preferred Stock, Convertible, Maximum Beneficial Ownership		19.99%
Equity Offering, Maximum Amount | $		$ 5,000,000
Preferred Stock, Convertible, Shares Issuable		435,414