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Property, plant and equipment (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Property, plant and equipment (Textual)        
Depreciation expense $ 92,984 $ 106,271 $ 277,648 $ 317,249