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Note 6 - Variable Interest Entities (Details Textual) - USD ($) $ in Thousands	1 Months Ended
	Jun. 30, 2026	Jun. 30, 2023	Dec. 31, 2025	Oct. 31, 2019
Assets	$ 49,684		$ 46,776
LGL System [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner				99.00%
LGL Nevada [Member]
Assets	621		615
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	4		$ 4
Skyline SPV [Member]
Assets	2,091
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	848
Lynch Capital [Member] \| Skyline SPV [Member]
Payments to Acquire Interest in Subsidiaries and Affiliates	$ 850
Equity Method Investment, Ownership Percentage	42.50%
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%