Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025
Cash flows from operating activities:
Net (loss) income attributable to LGL Group or non-controlling interests	$ (957)	$ 762
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of finite-lived intangible assets	15	16
Stock-based compensation	959	44
Unrealized gain on marketable securities	(5)	(13)
Accrued interest on convertible promissory note	(56)	0
Deferred income taxes	(262)	(654)
Changes in operating assets and liabilities:
Decrease in accounts receivable, net	14	33
Increase in inventories, net	(695)	(1)
Decrease in prepaid expenses and other assets	50	61
Increase in contract liabilities	792	43
Increase in accounts payable, accrued compensation, income taxes and commissions and other	252	134
Total adjustments	1,064	(337)
Net cash provided by operating activities	107	425
Cash flows from investing activities:
Purchase of convertible promissory note	(2,464)	0
Purchases, other	(17)	0
Net cash used in investing activities	(2,481)	0
Cash flows from financing activities:
Proceeds (payment) from exercise of warrants, net of costs	4,640	(73)
Proceeds from exercise of subscription rights, net of costs	41,524	0
Payment for taxes related to net share settlement of equity awards	(9)	0
Payment for repurchase of common stock	0	(366)
Net cash provided by (used in) financing activities	47,810	(439)
Increase (decrease) in cash and cash equivalents and restricted cash and cash equivalents	45,436	(14)
Cash and cash equivalents and restricted cash and cash equivalents at beginning of period	41,514	41,585
Cash and cash equivalents and restricted cash and cash equivalents at end of period	86,950	41,571
Non-cash financing activity:
Proceeds from exercise of warrants receivable	0	298
Supplemental disclosure:
Income taxes paid	80	47
Skyline SPV [Member]
Cash flows from financing activities:
Capital contributions from non-controlling interests - Skyline SPV	$ 1,655	$ 0