Accounting policies - Additional Information (Details) $ in Thousands, gal in Millions			1 Months Ended
Jun. 02, 2023 gal	Jan. 04, 2023 USD ($) shares	Jan. 31, 2023 USD ($)
PERC Water Corporation
Ownership interest held		100.00%
Kalaeloa Desalco
Seawater Reverse Osmosis Desalination Plant Per Day Processing Capacity \| gal	1.7
PERC Water Corporation
Ownership interest acquired		39.00%	39.00%
Shares of the Company's common stock \| shares		368,383
Cash		$ 2,400	$ 7,800
Common stock value		$ 5,360

The processing capacity per day seawater reverse osmosis desalination plant.

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