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Note 3 - Related Party Transactions (Details Textual) $ in Thousands		3 Months Ended		6 Months Ended
	Oct. 07, 2022	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Investment Expense Rate		0.08%		0.08%
Payment for Management Fee		$ 0		$ 0
Assets under Management, Carrying Amount		0		0
Cash and Cash Equivalents, at Carrying Value		6,501		6,501		$ 3,913
Income Tax Expense (Benefit)		402	$ 305	779	$ 471
Engineering, Selling and Administrative		3,394	2,654	6,384	5,089
LGL Group Inc. [Member]
Percentage of Distribution of Common Shares to Former Parents Stockholders	100.00%
GAMCO Investors [Member]
Cash and Cash Equivalents, at Carrying Value		4,844		4,844		$ 2,765
Investment Income, Interest		$ 45	0	$ 79	0
LGL Group Inc. [Member]
Number of Companies in Post Separation		2		2
LGL Group Inc. [Member] | Amended and Restated Transitional Administrative and Management Services Agreement [Member]
Related Party Transaction, Monthly Payment		$ 4		$ 4
Related Party Transaction, Amounts of Transaction		12	12	24	24
LGL Group Inc. [Member] | Separation Costs [Member]
Income Tax Expense (Benefit)		0	$ 0	0	$ 0
Engineering, Selling and Administrative		$ 27		$ 53
Percentage of Spin Off Costs Excess of Budgeted Amount Included in Engineering, Selling and Administrative				50.00%

X

- Definition

The aggregate total costs related to engineering a product design and manufacture, selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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