Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	Year Ended December 31,
	2022			2021
Statutory tax expense (benefit)		(21.0	)%		21.0	%
Increase (decrease) in taxes resulting from:
Nondeductible expenses		(2.6	)		3.3
Valuation allowance		23.6			(24.3	)
		0.0	%		0.0	%

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

	As of December 31,
	2022			2021
	(In thousands)
Deferred tax asset:
Carrying values of ownership interests and other holdings	$	33,222		$	31,985
Tax loss and credit carryforwards		68,492			77,045
Disallowed interest carryforwards		6,891			7,120
Accrued expenses		47			24
Stock-based compensation		180			268
Other		(106	)		136
		108,726			116,578
Valuation allowance		(108,726	)		(116,578	)
Net deferred tax asset	$	—		$	—

Summary of Operating Loss Carryforwards [Table Text Block]

	Total
	(In thousands)
2023	$	45,830
2024		50,140
2025		17,266
2026		7,648
2027 and thereafter		145,275
	$	266,159