Note 7 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	December 31,
	2021			2020
Deferred tax assets:
Net operating losses	$	64,418		$	75,303
Fixed asset basis difference		4,566			4,555
Contributions carryover		38			32
Deferred compensation		1,502			1,289
Accrued liabilities and others		333			303
Total deferred tax assets		70,857			81,482
Valuation allowance for deferred tax assets		(70,857	)		(81,482	)
Net deferred tax asset	$	-		$	-

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

	2021			2020
Expected federal income tax benefit at 21%	$	(6,560	)	$	(7,940	)
Increase (decrease) in valuation allowance		(8,530	)		3,617
State income tax		10			7
Expiring carryforwards		14,260			1,547
Non-deductible expenses and other		830			2,776
Income tax expense	$	10		$	7