Consolidated And Combined Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	LGL Group, inc.	Common Stock [Member]	Common Stock [Member] LGL Group, inc.	Paid-In Capital	Paid-In Capital LGL Group, inc.	Net Investment by The LGL Group, Inc.	Net Investment by The LGL Group, Inc. LGL Group, inc.	Retained Earnings
Balance at Dec. 31, 2020	$ 14,974						$ 14,974
Net income	1,582						1,582
Net transfers to The LGL Group, inc.		$ 293						$ 293
Balance at Dec. 31, 2021	$ 16,849						16,849
Balance, Shares at Dec. 31, 2021	0
Net income	$ 1,798						$ 1,586		$ 212
Net transfers to The LGL Group, inc.		$ (4,386)						(4,386)
Transfer by The LGL Group, Inc. to Capital and Paid-in Capital						$ 14,022		$ (14,049)
Transfer by The LGL Group, Inc. to Capital and Paid-in Capital, Shares				27
Share-based Compensation and Other	80				$ 80
Balance at Dec. 31, 2022	$ 14,341				$ 14,102				$ 212
Balance, Shares at Dec. 31, 2022	2,726,798		27