Note 8 - Capital Shares - Schedule of Warrants (Details) - $ / shares	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Balance, number of warrant shares (in shares)	609,717	720,909
Class of Warrant or Right, Outstanding	934,590	609,717
Balance, warrants, weighted average exercise price (in dollars per share)	$ 21.74	$ 19.51
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 15.35	$ 21.74
Expired, number of warrant shares (in shares)	(1,687)	111,192
Expired, warrants, weighted average exercise price (in dollars per share)	$ 22.4	$ 7.26
Class of Warrant or Right, Issued During Period	326,560
Issued, warrants, weighted average exercise price (in dollars per share)	$ 3.45
Warrant One [Member]
Class of Warrant or Right, Outstanding	173,614
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 10.5
Warrant Two [Member]
Class of Warrant or Right, Outstanding	15,627
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 56
Warrant Three [Member]
Class of Warrant or Right, Outstanding	27,399
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 31.94
Warrant Four [Member]
Class of Warrant or Right, Outstanding	391,390
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 24.64
Warrant Five [Member]
Class of Warrant or Right, Outstanding	326,560
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 3.45