Note 12 - Stockholders' Equity (Details Textual) - USD ($) |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Sep. 30, 2025 |
|
| Preferred Stock, Shares Issued (in shares) | 47,840 | 47,840 | ||||
| Treasury Stock, Common, Shares (in shares) | 754,391 | 754,391 | ||||
| Treasury Stock, Shares, Acquired (in shares) | 0 | 59,704 | ||||
| Treasury Stock, Value, Acquired, Cost Method | $ 112,000 | $ 259,000 | $ 157,000 | $ 528,000 | ||
| Shares Acquired, Average Cost Per Share (in dollars per share) | $ 8.85 | |||||
| Preferred Stock, Shares Outstanding (in shares) | 47,840 | 47,840 | ||||
| Series E Convertible Preferred Stock [Member] | ||||||
| Preferred Stock, Shares Issued (in shares) | 47,840 | 47,840 | ||||
| Preferred Stock, Shares Outstanding (in shares) | 47,840 | 47,840 | ||||
| X | ||||||||||
- Definition Number of shares issued for nonredeemable preferred shares and preferred shares redeemable solely at option of issuer. Includes, but is not limited to, preferred shares issued, repurchased, and held as treasury shares. Excludes preferred shares classified as debt. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. No definition available.
|
| X | ||||||||||
- Definition Number of previously issued common shares repurchased by the issuing entity and held in treasury. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Details
|