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Related party transactions (Details) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Related Party Transaction [Line Items]      
Accounts payable outstanding $ 715,549   $ 163,947
PERC Water Corporation      
Related Party Transaction [Line Items]      
Purchases of services 839,000 $ 156,000  
Accounts payable outstanding 716,000   $ 164,000
Amount of expense related to sublease agreement $ 24,000 $ 4,000