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Note 11 - Related Party Transactions (Details Textual) - USD ($)
1 Months Ended 3 Months Ended
Mar. 29, 2022
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Related Party [Member]        
Other Liabilities, Current   $ 33,000   $ 18,000
BSLF, L.L.C. [Member] | Funding Agreement [Member]        
Maximum Discount on Legal Service $ 300,000      
Litigation Service, Expense   $ 33,000 $ 0