Note 6 - Capital Shares - Schedule of Warrants (Details) - $ / shares	6 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Balance, shares (in shares)	609,717	720,909
Number of warrants (in shares)	934,590	610,787
Balance, 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	$ 21.76
Issued, shares (in shares)	326,560
Issued, weighted average exercise price (in dollars per share)	$ 3.45
Expired, shares (in shares)	(1,687)	(110,122)
Expired, weighted average exercise price (in dollars per share)	$ 22.4	$ 7
Balance, shares (in shares)	934,590	610,787
Balance, weighted average exercise price (in dollars per share)	$ 15.35	$ 21.76
Warrant One [Member]
Number of warrants (in shares)	173,614
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 10.5
Warrants, expiry dates	Dec. 31, 2025
Balance, shares (in shares)	173,614
Balance, weighted average exercise price (in dollars per share)	$ 10.5
Warrant Two [Member]
Number of warrants (in shares)	15,627
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 56
Warrants, expiry dates	Feb. 28, 2026
Balance, shares (in shares)	15,627
Balance, weighted average exercise price (in dollars per share)	$ 56
Warrant Three [Member]
Number of warrants (in shares)	27,399
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 31.94
Warrants, expiry dates	Mar. 31, 2027
Balance, shares (in shares)	27,399
Balance, weighted average exercise price (in dollars per share)	$ 31.94
Warrant Four [Member]
Number of warrants (in shares)	391,390
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 24.64
Warrants, expiry dates	Sep. 30, 2027
Balance, shares (in shares)	391,390
Balance, weighted average exercise price (in dollars per share)	$ 24.64
Warrant Five [Member]
Number of warrants (in shares)	326,560
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 3.45
Warrants, expiry dates	Sep. 30, 2029
Balance, shares (in shares)	326,560
Balance, weighted average exercise price (in dollars per share)	$ 3.45