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Note 4 - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2022
Current Income Tax Expense (Benefit), Total	$ 0
Operating Loss Carryforwards	$ 39,900	$ 44,000
Operating Loss Carryforwards, Will Be Carried Forward Indefinitely		$ 41,100
Operating Loss Carryforwards, Will Be Carried Forward Indefinitely, Available to Offset Taxable Income, Percentage	80.00%

X

- Definition

Amount of operating loss carryforward that will be carried forward Indefinitely, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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- Definition

Percentage available to Offset Taxable Income related to amount of operating loss carryforward that will be carried forward Indefinitely, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

No definition available.

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X

- Definition

Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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