Note 17 - Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2025

Notes Tables

Quarterly Financial Information [Table Text Block]

	Three months ended
(in thousands, except share data)	March 31, 2025			June 30, 2025			September 30, 2025			December 31, 2025
Revenues:
Net sales	$	498		$	491		$	661		$	803
Net investment income		417			428			442			410
Net gains		3			5			5			6
Total revenues		918			924			1,108			1,219
Expenses:
Manufacturing cost of sales		237			211			312			395
Engineering, selling and administrative		640			744			676			705
Total expenses		877			955			988			1,100
Income (loss) before income taxes		41			(31	)		120			119
Income tax expense (benefit)		28			14			(674	)		126
Net income (loss)		13			(45	)		794			(7	)
Less: Net income attributable to non-controlling interests		19			6			22			20
Net (loss) income attributable to LGL Group common stockholders	$	(6	)	$	(51	)	$	772		$	(27	)
(Loss) income per common share attributable to LGL Group common stockholders:
Basic (a)	$	(0.00	)	$	(0.01	)	$	0.15		$	(0.00	)
Diluted (a)	$	(0.00	)	$	(0.01	)	$	0.14		$	(0.00	)
Weighted average shares outstanding:
Basic		5,352,937			5,352,937			5,312,797			5,547,516
Diluted		5,352,937			5,352,937			5,649,743			5,547,516

	Three months ended
(in thousands, except share data)	March 31, 2024			June 30, 2024			September 30, 2024			December 31, 2024
Revenues:
Net sales	$	392		$	531		$	650		$	653
Net investment income		499			538			531			503
Net (losses) gains		(3	)		(1	)		(2	)		1
Total revenues		888			1,068			1,179			1,157
Expenses:
Manufacturing cost of sales		204			214			368			261
Engineering, selling and administrative		605			617			673			651
Total expenses		809			831			1,041			912
Income before income taxes		79			237			138			245
Income tax expense		36			76			48			17
Net income		43			161			90			228
Less: Net income attributable to non-controlling interests		22			24			18			26
Net income attributable to LGL Group common stockholders	$	21		$	137		$	72		$	202
Income per common share attributable to LGL Group common shareholders:
Basic (a)	$	0.00		$	0.03		$	0.01		$	0.04
Diluted (a)	$	0.00		$	0.02		$	0.01		$	0.04
Weighted average shares outstanding:
Basic		5,352,937			5,352,937			5,352,937			5,352,937
Diluted		5,604,430			5,482,543			5,531,969			5,577,062