Note 3 - Segment Information (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Months Ended September 30, 2025
	Electronic Instruments		Merchant Investment		Corporate			Consolidated
Revenues:
Net sales	$	661	$	—	$	—		$	661
Net investment income		—		274		168			442
Net gains		—		—		5			5
Total revenues		661		274		173			1,108
Less:
Manufacturing cost of sales		312		—		—			312
Engineering		74		—		—			74
Commissions		12		—		—			12
Sales and marketing		47		—		—			47
Accounting		—		—		49			49
Compensation		58		—		74			132
Corporation allocations (a)		13		145		(158	)		—
Other segment items (b)		41		—		321			362
Engineering, selling and administrative		245		145		286			676
Total expenses		557		145		286			988
Segment profit (loss)	$	104	$	129	$	(113	)	$	120
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items									—
Income from operations before income taxes								$	120

	Three Months Ended September 30, 2024
	Electronic Instruments		Merchant Investment		Corporate			Consolidated
Revenues:
Net sales	$	650	$	—	$	—		$	650
Net investment income		—		318		213			531
Net losses		—		—		(2	)		(2	)
Total revenues		650		318		211			1,179
Less:
Manufacturing cost of sales		368		—		—			368
Engineering		54		—		—			54
Commissions		20		—		—			20
Sales and marketing		52		—		—			52
Accounting		—		—		39			39
Compensation		69		—		309			378
Corporation allocations (a)		10		78		(88	)		—
Other segment items (b)		33		12		85			130
Engineering, selling and administrative		238		90		345			673
Total expenses		606		90		345			1,041
Segment profit (loss)	$	44	$	228	$	(134	)	$	138
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items									—
Income from operations before income taxes								$	138

	Nine Months Ended September 30, 2025
	Electronic Instruments		Merchant Investment		Corporate			Consolidated
Revenues:
Net sales	$	1,650	$	—	$	—		$	1,650
Net investment income		—		783		504			1,287
Net gains		—		—		13			13
Total revenues		1,650		783		517			2,950
Less:
Manufacturing cost of sales		760		—		—			760
Engineering		188		—		—			188
Commissions		52		—		—			52
Sales and marketing		139		—		—			139
Accounting		—		—		174			174
Compensation		166		—		423			589
Corporation allocations (a)		35		331		(366	)		—
Other segment items (b)		119		22		777			918
Engineering, selling and administrative		699		353		1,008			2,060
Total expenses		1,459		353		1,008			2,820
Segment profit (loss)	$	191	$	430	$	(491	)	$	130
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items									—
Income from operations before income taxes								$	130

	Nine Months Ended September 30, 2024
	Electronic Instruments		Merchant Investment		Corporate			Consolidated
Revenues:
Net sales	$	1,573	$	—	$	—		$	1,573
Net investment income		—		922		646			1,568
Net losses		—		—		(6	)		(6	)
Total revenues		1,573		922		640			3,135
Less:
Manufacturing cost of sales		786		—		—			786
Engineering		141		—		—			141
Commissions		75		—		—			75
Sales and marketing		132		—		—			132
Accounting		—		—		227			227
Compensation		189		—		585			774
Corporation allocations (a)		29		204		(233	)		—
Other segment items (b)		101		13		432			546
Engineering, selling and administrative		667		217		1,011			1,895
Total expenses		1,453		217		1,011			2,681
Segment profit (loss)	$	120	$	705	$	(371	)	$	454
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items									—
Income from operations before income taxes								$	454

Segment, Reconciliation of Other Items from Segments to Consolidated [Table Text Block]

	Three Months Ended September 30, 2025
	Electronic Instruments			Merchant Investment		Corporate			Total			Adjustments and Reconciling Items		Consolidated
Interest revenue (a)	$	—		$	274	$	168		$	442		$	—	$	442
Amortization (b)		(27	)		—		—			(27	)		—		(27	)
Other significant non-cash items:
Stock-based compensation (c)		—			—		(18	)		(18	)		—		(18	)
Capital expenditures		—			—		—			—			—		—

	Three Months Ended September 30, 2024
	Electronic Instruments			Merchant Investment		Corporate			Total			Adjustments and Reconciling Items		Consolidated
Interest revenue (a)	$	—		$	318	$	213		$	531		$	—	$	531
Amortization (b)		(11	)		—		—			(11	)		—		(11	)
Other significant non-cash items:
Stock-based compensation (c)		—			—		(9	)		(9	)		—		(9	)
Capital expenditures		—			—		—			—			—		—

	Nine Months Ended September 30, 2025
	Electronic Instruments			Merchant Investment		Corporate			Total			Adjustments and Reconciling Items		Consolidated
Interest revenue (a)	$	—		$	783	$	504		$	1,287		$	—	$	1,287
Amortization (b)		(16	)		—		—			(16	)		—		(16	)
Other significant non-cash items:
Stock-based compensation (c)		—			—		(44	)		(44	)		—		(44	)
Capital expenditures		—			—		—			—			—		—

	Nine Months Ended September 30, 2024
	Electronic Instruments		Merchant Investment		Corporate			Total			Adjustments and Reconciling Items		Consolidated
Interest revenue (a)	$	—	$	922	$	646		$	1,568		$	—	$	1,568
Amortization (b)		—		—		—			—			—		—
Other significant non-cash items:
Stock-based compensation (c)		—		—		(27	)		(27	)		—		(27	)
Capital expenditures		—		—		—			—			—		—

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	September 30, 2025
	Electronic Instruments		Merchant Investment		Corporate		Total		Adjustments and Reconciling Items		Consolidated
Total assets	$	1,223	$	25,508	$	16,553	$	43,284	$	—	$	43,284

	December 31, 2024
	Electronic Instruments		Merchant Investment		Corporate		Total		Adjustments and Reconciling Items		Consolidated
Total assets	$	1,249	$	24,748	$	17,148	$	43,145	$	—	$	43,145