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Note 8 - Revenue From Contracts With Customers (Details Textual) - USD ($)
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Revenue from Contract with Customer, Excluding Assessed Tax $ 884,000 $ 809,000
Credit and Debit Card [Member]    
Revenue from Contract with Customer, Excluding Assessed Tax $ 284,000 $ 310,000