Note 5 - Capital Shares - Schedule of Warrants (Details) - $ / shares	9 Months Ended
Jun. 30, 2026	Jun. 30, 2025
Balance, number of warrant shares (in shares)	934,590	609,717
Balance, number of warrant shares (in shares)	745,349	934,590
Balance, warrants, weighted average exercise price (in dollars per share)	$ 15.35	$ 21.74
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 15.62	$ 15.35
Expired, number of warrant shares (in shares)	(189,241)	(1,687)
Expired, warrants, weighted average exercise price (in dollars per share)	$ 14.26	$ 22.4
Issued, number of warrant shares (in shares)		326,560
Issued, warrants, weighted average exercise price (in dollars per share)		$ 3.45
Balance, number of warrant shares (in shares)	745,349	934,590
Balance, warrants, weighted average exercise price (in dollars per share)	$ 15.62	$ 15.35
Warrant One [Member]
Balance, number of warrant shares (in shares)	27,399
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 31.94
Warrants, maturity date	Mar. 31, 2027
Balance, number of warrant shares (in shares)	27,399
Balance, warrants, weighted average exercise price (in dollars per share)	$ 31.94
Warrant Two [Member]
Balance, number of warrant shares (in shares)	391,390
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 24.64
Warrants, maturity date	Sep. 30, 2027
Balance, number of warrant shares (in shares)	391,390
Balance, warrants, weighted average exercise price (in dollars per share)	$ 24.64
Warrant Three [Member]
Balance, number of warrant shares (in shares)	326,560
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 3.45
Warrants, maturity date	Oct. 31, 2029
Balance, number of warrant shares (in shares)	326,560
Balance, warrants, weighted average exercise price (in dollars per share)	$ 3.45