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, 2023	$ 53	$ (580)	$ 46,349	$ (7,060)	$ 38,762	$ 1,920	$ 40,682
Net (loss) 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
Balance at Dec. 31, 2024	53	(580)	46,385	(6,628)	39,230	2,010	41,240
Net (loss) income attributable to LGL Group or non-controlling interests	0	0	0	(6)	(6)	19	13
Stock-based compensation	0	0	9	0	9	0	9
Balance at Mar. 31, 2025	$ 53	$ (580)	$ 46,394	$ (6,634)	$ 39,233	$ 2,029	$ 41,262