Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	2021			2020
	(in thousands)
Federal income tax benefit at statutory rate	$	(718	)	$	(547	)
Adjusted for:
Permanent differences and other		102			72
Valuation allowance		616			475
Income tax expense	$	-		$	-

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

	2021			2020
	(in thousands)
Net operating loss and tax credit carryforwards	$	25,132		$	24,956
Joint venture and other investments		(27	)		(27	)
Accrued retirement benefits		2,545			3,329
Property net book value		2,862			3,357
Deferred revenue		1,083			715
Reserves and other		(5	)		29
Total deferred tax assets		31,590			32,359
Valuation allowance		(31,590	)		(32,359	)
Net deferred tax assets	$	-		$	-