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Note 7 - Related Party Transactions (Tables) | 3 Months Ended
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Mar. 31, 2026
Notes Tables |
Schedule of Related Party Transactions [Table Text Block] |
|  | Three Months Ended March 31,
|  | 2026 |  | 2025
|  | Income |  | Expense |  | Income |  | Expense
GAMCO Investors, Inc. |  | $ | 346 |  |  | $ | — |  |  | $ | 348 |  |  | $ | — |
M-tron Industries, Inc. |  |  | — |  |  |  | 40 |  |  |  | — |  |  |  | (14 | )
Total |  | $ | 346 |  |  | $ | 40 |  |  | $ | 348 |  |  | $ | (14 | )
|  | March 31, 2026 |  | December 31, 2025
|  | Assets |  | Liabilities |  | Assets |  | Liabilities
GAMCO Investors, Inc. |  | $ | 41,188 |  |  | $ | — |  |  | $ | 36,175 |  |  | $ | — |
M-tron Industries, Inc. |  |  | — |  |  |  | 316 |  |  |  | — |  |  |  | 227 |
Total |  | $ | 41,188 |  |  | $ | 316 |  |  | $ | 36,175 |  |  | $ | 227 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 850 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483326/850-10-50-1 + Details
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- References No definition available. + Details
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