Note 6 - Variable Interest Entities (Details Textual) - USD ($) $ in Thousands	1 Months Ended
	Jun. 30, 2023	Sep. 30, 2026	Jun. 30, 2026	Dec. 31, 2025	Oct. 31, 2019
Assets		$ 91,972		$ 46,776
LGL System [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner					99.00%
LGL Nevada [Member]
Assets		624		615
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount		4		$ 4
Skyline SPV [Member]
Assets		3,194
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount		2,520
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Parent, Amount		854
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Noncontrolling Interests, Amount		$ 1,666
Lynch Capital [Member] | Skyline SPV [Member]
Equity Method Investment, Ownership Percentage		33.90%	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%