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Note 11 - Subsequent Events (Details Textual) - USD ($)
3 Months Ended
Mar. 09, 2022
Mar. 31, 2022
Mar. 31, 2021
Mar. 22, 2022
Change in Control Pursuant to Issuance of Common Stock, Shares (in shares)     4,199,998  
Subsequent Event [Member]        
Payments for Underwriting Deposit $ 75,000      
Subsequent Event [Member] | Unqualified Income Tax Refund, Employee Retention Tax Credits, Amount [Member]        
Proceeds from Income Tax Refunds   $ 443,000    
Cross River Working Capital Note [Member] | Subsequent Event [Member]        
Debt Instrument, Face Amount 1,200,000     $ 1,200,000
Interest Payable $ 15,000