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Note 4 - Segment Reporting (Details Textual)
3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Jun. 30, 2023
USD ($)
Jun. 30, 2022
USD ($)
Number of Operating Segments     3  
Total segment revenues $ 370,380 $ 310,214 $ 536,142 $ 492,130
Intersegment Eliminations [Member]        
Total segment revenues     $ 0