Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - 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	0	27	27	0	27
Stock-based compensation	0	0	0	0	0	0	0
Consolidation of non-controlling interests	0	0	0	0	0	1,872	1,872
Balance at Jun. 30, 2023	53	(580)	46,346	(7,302)	38,517	1,872	40,389
Balance at Mar. 31, 2023	53	(580)	46,346	(7,172)	38,647	0	38,647
Net income attributable to LGL Group or non-controlling interests	0	0	0	(130)	(130)	0	(130)
Stock-based compensation	0	0	0	0	0	0	0
Consolidation of non-controlling interests	0	0	0	0	0	1,872	1,872
Balance at Jun. 30, 2023	53	(580)	46,346	(7,302)	38,517	1,872	40,389
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	158	158	46	204
Stock-based compensation	0	0	18	0	18	0	18
Consolidation of non-controlling interests	0	0	0	0	0	0	0
Balance at Jun. 30, 2024	53	(580)	46,367	(6,902)	38,938	1,966	40,904
Balance at Mar. 31, 2024	53	(580)	46,358	(7,039)	38,792	1,942	40,734
Net income attributable to LGL Group or non-controlling interests	0	0	0	137	137	24	161
Stock-based compensation	0	0	9	0	9	0	9
Consolidation of non-controlling interests	0	0	0	0	0	0	0
Balance at Jun. 30, 2024	$ 53	$ (580)	$ 46,367	$ (6,902)	$ 38,938	$ 1,966	$ 40,904