Note B - Non-controlling Interests (Details Textual) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Equity, Attributable to Noncontrolling Interest	$ 1,872,000	$ 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