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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 |

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