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Subsequent events (Details) - USD ($)
$ in Millions
1 Months Ended
Jan. 04, 2023
Jan. 31, 2023
PERC Water Corporation    
Subsequent Event [Line Items]    
Ownership interest held 100.00%  
PERC Water Corporation    
Subsequent Event [Line Items]    
Ownership interest acquired 39.00% 39.00%
Cash $ 2.4 $ 7.8
Shares of the Company's common stock 368,383