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Note 6 - Variable Interest Entities (Details Textual) - USD ($) $ in Thousands | 1 Months Ended |  |  |
--- | --- | --- | --- | ---
Jun. 30, 2023 | Sep. 30, 2025 | Dec. 31, 2024 | Oct. 31, 2019
Equity, Attributable to Noncontrolling Interest |  | $ 2,057 | $ 2,010 |
LGL System [Member] |  |  |  |
Subsidiary, Ownership Percentage, Noncontrolling Owner |  |  |  | 99.00%
LGL System [Member] |  |  |  |
Equity, Attributable to Noncontrolling Interest |  | $ 2,057,000 | $ 2,010,000 |
Lynch Capital [Member] | LGL Nevada [Member] |  |  |  |
Payments to Acquire Interest in Subsidiaries and Affiliates | $ 4 |  |  |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 1.00% |  |  |
Lynch Capital [Member] | LGL System [Member] |  |  |  |
Payments to Acquire Interest in Subsidiaries and Affiliates | $ 1,000 |  |  |
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage | 34.80% |  |  |

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