Note 9 - Stockholders' Equity - Schedule of Preferred Stock Conversion Rights (Details)	Mar. 31, 2025 shares	Sep. 30, 2024 shares	May 01, 2024
Preferred stock, conversion ratio			0.0001
Series A Preferred Stock [Member]
Preferred stock, shares ouststanding (in shares)	648	648
Preferred stock, conversion ratio	4
Preferred stock, votes (in shares)	648
Preferred stock, outstanding (in shares)	648	648
Series B Preferred Stock [Member]
Preferred stock, shares ouststanding (in shares)	0
Preferred stock, conversion ratio	0
Preferred stock, votes (in shares)	0
Preferred stock, outstanding (in shares)	0
Series C Preferred Stock [Member]
Preferred stock, shares ouststanding (in shares)	458	458
Preferred stock, conversion ratio	1
Preferred stock, votes (in shares)	1
Preferred stock, outstanding (in shares)	458	458
Series D Preferred Stock [Member]
Preferred stock, shares ouststanding (in shares)	363,097	363,097
Preferred stock, conversion ratio	1
Preferred stock, votes (in shares)	363,097
Preferred stock, outstanding (in shares)	363,097	363,097
Series E Preferred Stock [Member]
Preferred stock, shares ouststanding (in shares)	0
Preferred stock, conversion ratio	0
Preferred stock, votes (in shares)	0
Preferred stock, outstanding (in shares)	0