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Note 4 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Current Income Tax Expense (Benefit)	$ 0	$ 0
Operating Loss Carryforwards	45,900,000	44,000,000
Operating Loss Carryforwards, Will Be Carried Forward Indefinitely	$ 42.9
Operating Loss Carryforwards, Will Be Carried Forward Indefinitely, Available to Offset Taxable Income, Percentage	80.00%
Foreign Tax Authority [Member]
Operating Loss Carryforwards	$ 1,400,000	$ 1,400,000

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

No definition available.

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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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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