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Note 10 - Stockholders' Equity - Rollforward of Outstanding Shares (Details) - shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Dec. 31, 2025
Held in treasury, balance (in shares) | (133,047) |
Repurchase of common stock (in shares) | 0 |
Shares, end of period (in shares) | (133,047) | (133,047)
Common Stock [Member] |  |
Shares, beginning of year (in shares) | 6,307,997 | 5,454,639
Stock-based compensation (in shares) | 152,402 | 16,156
Stock issued for settlement of warrants (in shares) | 214,462 | 837,202
Shares withheld for income taxes (in shares) | (1,379) | 0
Shares, end of period (in shares) | 6,673,482 | 6,307,997
Treasury Stock, Common [Member] |  |
Held in treasury, balance (in shares) | (133,047) | (81,584)
Repurchase of common stock (in shares) | 0 | (51,463)
Shares, end of period (in shares) | (133,047) | (133,047)
Common Stock Outstanding [Member] |  |
Shares, beginning of year (in shares) | 6,174,950 | 5,373,055
Stock-based compensation (in shares) | 152,402 | 16,156
Stock issued for settlement of warrants (in shares) | 214,462 | 837,202
Shares withheld for income taxes (in shares) | (1,379) | 0
Repurchase of common stock (in shares) | 0 | (51,463)
Shares, end of period (in shares) | 6,540,435 | 6,174,950

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- Definition Number of shares issued which are neither cancelled nor held in the treasury. + 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 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -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 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480070/505-10-S50-1 + Details
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- Definition Number of shares used to settle grantee's tax withholding obligation 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 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-4 + Details
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