Annual report pursuant to Section 13 and 15(d)

Note 9 - Income Taxes (Details Textual)

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Note 9 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Deferred Tax Assets, Valuation Allowance $ 521,000 $ 306,000
Unrecognized Tax Benefits, Ending Balance 0 0
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit 0  
Domestic Tax Authority [Member]    
Operating Loss Carryforwards $ 1,700,000 1,500,000
Open Tax Year 2019 2020 2021  
Domestic Tax Authority [Member] | Net Operating Loss Carryforwards [Member]    
Deferred Tax Assets, Valuation Allowance $ 150,000  
State and Local Jurisdiction [Member]    
Operating Loss Carryforwards $ 3,900,000 $ 3,200,000
Open Tax Year 2018 2019 2020 2021  
State and Local Jurisdiction [Member] | Net Operating Loss Carryforwards [Member]    
Deferred Tax Assets, Valuation Allowance $ 371,000