Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Notes Tables

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Years Ended December 31,
(in thousands)	2024			2023
Continuing Operations:
Current:
Federal	$	(7	)	$	(24	)
State		—			(2	)
Total Current		(7	)		(26	)
Deferred:
Federal		—			(1,072	)
State		—			—
Total Deferred		—			(1,072	)
Total Continuing Operations	$	(7	)	$	(1,098	)
Discontinued Operation:
Current:
Federal	$	—		$	—
State		—			—
Total Current		—			—
Deferred:
Federal		—			—
State		—			—
Total Deferred		—			—
Total Discontinued Operation	$	—		$	—
Total Income Tax Expense	$	(7	)	$	(1,098	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Years Ended December 31,
	2024			2023
Federal statutory rate		21.0	%		21.0	%
Permanent non-taxable income		(3.5	)%		0.2	%
Business credits		21.3	%		2.8	%
State taxes, net of federal benefit		0.0	%		(0.1	)%
Valuation allowance		(38.7	)%		(68.6	)%
Other		(0.6	)%		(0.1	)%
		(0.5	)%		(44.8	)%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	Years Ended December 31,
(in thousands)	2024			2023
Deferred Tax Assets:
Inventories	$	202		$	254
Accrued employees' compensation and benefits costs		316			362
Postretirement adjustment (accumulated other comprehensive loss)		566			635
Accrued litigation settlement		128			39
State credit carryforwards		157			177
Federal credit carryforwards		302			—
Federal net operating loss carryforward		482			1,493
Bad debt reserve		3			26
Warranty reserve		70			114
Research and experimentation expenses		2,217			751
Customer accruals		156			344
Sec 163(j) disallowed interest		46			83
Other		1			1
Total deferred tax assets		4,646			4,279
Valuation allowance		(3,727	)		(3,145	)
Net deferred tax assets		919			1,134
Deferred tax liabilities:
Prepaid expenses		(78	)		(71	)
Property, plant and equipment		(841	)		(853	)
Other receivable - insurance proceeds		—			(210	)
Total deferred tax liabilities		(919	)		(1,134	)
Net deferred tax assets	$	—		$	—