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Note B - Non-controlling Interests (Details Textual) - USD ($)
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Equity, Attributable to Noncontrolling Interest $ 1,894,000   $ 0
Lynch Capital [Member]      
Investment Owned, Balance, Principal Amount   $ 1,000,000  
LGL System [Member]      
Equity, Attributable to Noncontrolling Interest   $ 1,872,000  
LGL Nevada [Member]      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners   1.00%  
LGL Nevada [Member]      
Investment Owned, Balance, Principal Amount   $ 4,000