Note 6 - Net Income Per Common Share (Details Textual) - $ / shares |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
|---|---|---|---|---|
| Common Stock, Par or Stated Value Per Share | $ 0.0001 | $ 0.0001 | $ 0.0001 | |
| Class of Warrant or Right, Outstanding | 1,829,108 | |||
| Warrants [Member] | ||||
| Class of Warrant or Right, Outstanding | 750,000 | 0 | ||
| Warrants and Rights Outstanding, Term | 10 years | |||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 0.35 | |||
| Prefunded Warrants [Member] | ||||
| Class of Warrant or Right, Outstanding | 1,079,108 | 0 | ||
| Warrants and Rights Outstanding, Term | 10 years | |||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 0.0001 |