Note 7 - Income Taxes (Details Textual) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Deferred Tax Assets, Net of Valuation Allowance	$ 1.5
Deferred Tax Assets, Valuation Allowance	$ 4.6
Operating Loss Carryforwards		$ 23.9
Tax Year 2022 [Member]
Operating Loss Carryforwards		$ 9.1

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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-Topic 740
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