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Other payables - Conversion instruments (Details) - Madryn Credit Facility - USD ($)
Dec. 31, 2022
Jul. 14, 2022
Dec. 31, 2021
Other payables      
Conversion instruments $ 1,605,429 $ 892,950 $ 0
Maximum outstanding principal amount to be converted   $ 5,000,000  
Conversion price   $ 1.90  
Change in Fair Value of Converted Instruments $ 712,479   $ 0