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	157	157	0	157
Stock-based compensation	0	0	0	0	0	0	0
Balance at Mar. 31, 2023	53	(580)	46,346	(7,172)	38,647	0	38,647
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	21	21	22	43
Stock-based compensation	0	0	9	0	9	0	9
Balance at Mar. 31, 2024	$ 53	$ (580)	$ 46,358	$ (7,039)	$ 38,792	$ 1,942	$ 40,734