Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock, Common [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2022	$ 53	$ (580)	$ 46,346	$ (7,329)	$ 38,490	$ 0	$ 38,490
Net income attributable to LGL Group or non-controlling interests		0	0	269	269	48	317
Consolidation of non-controlling interests		0	0	0	0	1,872	1,872
Stock-based compensation	0	0	3	0	3	0	3
Balance at Dec. 31, 2023	53	(580)	46,349	(7,060)	38,762	1,920	40,682
Net income attributable to LGL Group or non-controlling interests	0	0	0	432	432	90	522
Consolidation of non-controlling interests		0	0	0	0	0	0
Stock-based compensation	0	0	36	0	36	0	36
Balance at Dec. 31, 2024	$ 53	$ (580)	$ 46,385	$ (6,628)	$ 39,230	$ 2,010	$ 41,240