Note 8 - Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	Year Ended December 31,
	2021			2020
Statutory tax expense (benefit)		21.0	%		(21.0	)%
Increase (decrease) in taxes resulting from:
Nondeductible expenses		3.3			4.1
Valuation allowance		(24.3	)		16.9
		0.0	%		0.0	%

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

	As of December 31,
	2021			2020
	(In thousands)
Deferred tax asset:
Carrying values of ownership interests and other holdings	$	31,985		$	38,361
Tax loss and credit carryforwards		77,045			76,023
Disallowed interest carryforwards		7,120			7,292
Accrued expenses		24			497
Stock-based compensation		268			302
Other		136			482
		116,578			122,957
Valuation allowance		(116,578	)		(122,957	)
Net deferred tax asset	$	—		$	—

Summary of Operating Loss Carryforwards [Table Text Block]

	Total
	(In thousands)
2022	$	47,137
2023		47,150
2024		50,140
2025		17,266
2026 and thereafter		152,923
	$	314,616