Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Skyline SPV [Member] Common Stock [Member]	Skyline SPV [Member] Treasury Stock, Common [Member]	Skyline SPV [Member] Additional Paid-in Capital [Member]	Skyline SPV [Member] Retained Earnings [Member]	Skyline SPV [Member] Parent [Member]	Skyline SPV [Member] Noncontrolling Interest [Member]	Skyline SPV [Member]	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, 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	715	715	47	762
Stock-based compensation								0
Stock-based compensation									0	44	0	44	0	44
Shares withheld for employee taxes								0	0	0	0	0	0	0
Exercise of warrants, net of costs								1	0	225	0	226	0	226
Exercise of subscription rights, net of costs								0	0	0	0	0	0	0
Repurchases of common stock								0	(366)	0	0	(366)	0	(366)
Consolidation of non-controlling interests - Skyline SPV	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Balance at Sep. 30, 2025								54	(946)	46,654	(5,913)	39,849	2,057	41,906
Balance at Jun. 30, 2025								53	(580)	46,309	(6,685)	39,097	2,035	41,132
Net (loss) income attributable to LGL Group or non-controlling interests								0	0	0	772	772	22	794
Stock-based compensation								0
Stock-based compensation									0	18	0	18	0	18
Shares withheld for employee taxes								0	0	0	0	0	0	0
Exercise of warrants, net of costs								1	0	327	0	328	0	328
Exercise of subscription rights, net of costs								0	0	0	0	0	0	0
Repurchases of common stock								0	(366)	0	0	(366)	0	(366)
Consolidation of non-controlling interests - Skyline SPV	0	0	0	0	0	0	0
Balance at Sep. 30, 2025								54	(946)	46,654	(5,913)	39,849	2,057	41,906
Balance at Dec. 31, 2025								61	(946)	50,313	(5,940)	43,488	2,077	45,565
Net (loss) income attributable to LGL Group or non-controlling interests								0	0	0	(1,020)	(1,020)	63	(957)
Stock-based compensation								2
Stock-based compensation									0	957	0	959	0	959
Shares withheld for employee taxes								0	0	(9)		(9)		(9)
Exercise of warrants, net of costs								2	0	988	0	990	0	990
Exercise of subscription rights, net of costs								61	0	41,463		41,524		41,524
Repurchases of common stock								0	0	0	0	0	0	0
Consolidation of non-controlling interests - Skyline SPV	0	0	0	0	0	1,655	1,655
Balance at Sep. 30, 2026								126	(946)	93,712	(6,960)	85,932	3,795	89,727
Balance at Jun. 30, 2026								65	(946)	52,138	(6,915)	44,342	3,245	47,587
Net (loss) income attributable to LGL Group or non-controlling interests								0	0	0	(45)	(45)	45	0
Stock-based compensation								0
Stock-based compensation									0	111	0	111	0	111
Shares withheld for employee taxes								0	0	0	0	0	0	0
Exercise of warrants, net of costs								0	0	0	0	0	0	0
Exercise of subscription rights, net of costs								61	0	41,463	0	41,524	0	41,524
Repurchases of common stock								0	0	0	0	0	0	0
Consolidation of non-controlling interests - Skyline SPV	$ 0	$ 0	$ 0	$ 0	$ 0	$ 505	$ 505
Balance at Sep. 30, 2026								$ 126	$ (946)	$ 93,712	$ (6,960)	$ 85,932	$ 3,795	$ 89,727