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Note 7 - Stock-based Compensation (Details Textual) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Jun. 30, 2021
Share-Based Payment Arrangement, Expense, after Tax | $ 89,000 | $ 98,000 |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount | $ 21,000 |  |
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year) | 3 years |  |
Incentive Compensation Plan [Member] |  |  |
Common Stock, Capital Shares Reserved for Future Issuance (in shares) |  |  | 2,580,000

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- Definition Amount, after tax, of expense for award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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