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Note G - Note Receivable (Details Textual) - USD ($)
3 Months Ended
Sep. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Financing Receivable, after Allowance for Credit Loss, Current, Total $ 295,000 $ 295,000
Receivable with Imputed Interest, Effective Yield (Interest Rate) 5.00%