Note 11 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	2022			2021
	(in thousands)
Federal income tax expense (benefit) at statutory rate	$	375		$	(718	)
Adjusted for:
Permanent differences		86			102
Valuation allowance		(461	)		616
Income tax expense (benefit)	$	-		$	-

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

	2022			2021
	(in thousands)
Net operating loss and tax credit carryforwards	$	23,980		$	25,132
Joint venture and other investments		(27	)		(27	)
Accrued retirement benefits		1,149			2,545
Property net book value		2,960			2,862
Deferred revenue		1,016			1,083
Reserves and other		(50	)		(5	)
Total deferred tax assets		29,028			31,590
Valuation allowance		(29,028	)		(31,590	)
Net deferred tax assets	$	-		$	-