Note 3 - Segment Information (Tables)

3 Months Ended

Mar. 31, 2025

Notes Tables

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

	Three Months Ended March 31, 2025
	Electronic Instruments		Merchant Investment		Corporate			Consolidated
Revenues:
Net sales	$	498	$	—	$	—		$	498
Net investment income		—		247		170			417
Net gains (losses)		—		—		3			3
Total revenues		498		247		173			918
Less:
Manufacturing cost of sales		237		—		—			237
Engineering		57		—		—			57
Commissions		19		—		—			19
Sales and marketing		57		—		—			57
Accounting		—		—		75			75
Compensation		56		—		192			248
Corporate allocations (a)		11		93		(104	)		—
Other segment items (b)		42		1		141			184
Engineering, selling and administrative		242		94		304			640
Total expenses		479		94		304			877
Segment profit (loss)	$	19	$	153	$	(131	)	$	41
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items									—
Income from operations before income taxes								$	41

	Three Months Ended March 31, 2024
	Electronic Instruments		Merchant Investment		Corporate			Consolidated
Revenues:
Net sales	$	392	$	—	$	—		$	392
Net investment income		—		289		210			499
Net (losses) gains		—		—		(3	)		(3	)
Total revenues		392		289		207			888
Less:
Manufacturing cost of sales		204		—		—			204
Engineering		39		—		—			39
Commissions		19		—		—			19
Sales and marketing		33		—		—			33
Accounting		—		—		156			156
Compensation		58		—		130			188
Corporate allocations (a)		9		49		(58	)		—
Other segment items (b)		28		—		142			170
Engineering, selling and administrative		186		49		370			605
Total expenses		390		49		370			809
Segment profit (loss)	$	2	$	240	$	(163	)	$	79
Reconciliation of Segment profit (loss) to Income (loss) from operations before income taxes
Adjustments and reconciling items									—
Income from operations before income taxes								$	79

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

	Three Months Ended March 31, 2025
	Electronic Instruments		Merchant Investment		Corporate		Total		Adjustments and Reconciling Items		Consolidated
Interest revenue (a)	$	—	$	247	$	170	$	417	$	—	$	417
Amortization (b)		6		—		—		6		—		6
Other significant non-cash items
Stock-based compensation (c)		—		—		9		9		—		9
Capital expenditures		—		—		—		—		—		—

	Three Months Ended March 31, 2024
	Electronic Instruments		Merchant Investment		Corporate		Total		Adjustments and Reconciling Items		Consolidated
Interest revenue (a)	$	—	$	289	$	210	$	499	$	—	$	499
Amortization (b)		5		—		—		5		—		5
Other significant non-cash items
Stock-based compensation (c)		—		—		9		9		—		9
Capital expenditures		—		—		—		—		—		—

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

	March 31, 2025
	Electronic Instruments		Merchant Investment		Corporate		Total		Adjustments and Reconciling Items		Consolidated
Total assets	$	998	$	24,993	$	17,311	$	43,302	$	—	$	43,302

	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