Note 1 - Description of Business and Basis of Presentation - Schedule of Impact of Reverse Stock Splits on Common Stock (Details) - Common Stock [Member] - shares

12 Months Ended

Sep. 30, 2024

Jun. 30, 2025

Mar. 31, 2025

Jun. 30, 2024

Mar. 31, 2024

Sep. 30, 2023

Balance (in shares)

1

^[1]

99,568

41

1

1

1

^[1]

Increase of common stock during fiscal year 2024 (in shares)

0

Previously Reported [Member]

Balance (in shares)

4,577,307

28,718

Increase of common stock during fiscal year 2024 (in shares)

4,548,589

Restatement Adjustment, Reverse Stock Split 1:60 [Member]

Balance (in shares)

(4,501,019)

(28,239)

Increase of common stock during fiscal year 2024 (in shares)

(4,472,780)

Restatement Adjustment, Reverse Stock Split 1:100 [Member]

Balance (in shares)

(75,525)

(474)

Increase of common stock during fiscal year 2024 (in shares)

(75,051)

Restatement Adjustment, Reverse Stock Split 1:100 June 2025 [Member]

Balance (in shares)

(754)

(4)

Increase of common stock during fiscal year 2024 (in shares)

(750)

Restatement Adjustment, Reverse Stock Split 1:250 August 2025 [Member]

Balance (in shares)

(8)

0

Increase of common stock during fiscal year 2024 (in shares)

(8)

[1]	Adjusted retroactively for reverse stock splits, see Note 1 - Description of Business and Basis of Presentation