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Related party transactions (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Related party transactions        
Royalties earned     $ 0  
Consultancy services with Stone Sunny Isles Inc.        
Related party transactions        
Amount of transaction $ 100,000 $ 44,000 $ 100,000 $ 100,000