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Note 4 - Segment Reporting (Details Textual)
3 Months Ended 9 Months Ended
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Sep. 30, 2023
USD ($)
Sep. 30, 2022
USD ($)
Number of Operating Segments     3  
Total segment revenues $ 259,031 $ 330,232 $ 795,173 $ 822,362
Intersegment Eliminations [Member]        
Total segment revenues     $ 0