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Note 10 - Stockholders' Equity - Rollforward of Outstanding Shares (Details) - shares | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2025 | Dec. 31, 2024
Held in treasury, balance (in shares) |  | (81,584) |
Repurchases of common stock (in shares) | (51,463) |  |
Held in treasury, balance (in shares) | (133,047) | (133,047) | (81,584)
Common Stock [Member] |  |  |
Shares, beginning of year (in shares) |  | 5,454,639 | 5,454,639
Stock-based compensation (in shares) |  | 16,156 | 0
Shares issued from settlement of Warrants (in shares) |  | 68,996 | 0
Shares, end of period (in shares) | 5,539,791 | 5,539,791 | 5,454,639
Treasury Stock, Common [Member] |  |  |
Held in treasury, balance (in shares) |  | (81,584) | (81,584)
Repurchases of common stock (in shares) |  | (51,463) | 0
Held in treasury, balance (in shares) | (133,047) | (133,047) | (81,584)
Common Stock Outstanding [Member] |  |  |
Shares, beginning of year (in shares) |  | 5,373,055 | 5,373,055
Stock-based compensation (in shares) |  | 16,156 | 0
Shares issued from settlement of Warrants (in shares) |  | 68,996 | 0
Repurchases of common stock (in shares) |  | (51,463) | 0
Shares, end of period (in shares) | 5,406,744 | 5,406,744 | 5,373,055

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- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 + Details
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- Definition Number, before forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 + Details
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -SubTopic 10 -Topic 505 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 + Details
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