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Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Excludes Selling, General and Administrative Expense.

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Related party transactions (Details) - USD ($)	3 Months Ended	6 Months Ended
Related party transactions (Details) - USD ($)	Jun. 30, 2022	Jun. 30, 2022	Jan. 31, 2023	Jan. 04, 2023	Dec. 31, 2022
PERC Water Corporation
Related Party Transaction [Line Items]
Purchases of services	$ 641,000	$ 1,480,000
Accounts payable outstanding					$ 404,000
Amount of expense related to sublease agreement	$ 24,000	$ 48,000
PERC Water Corporation
Related Party Transaction [Line Items]
Ownership interest acquired			39.00%	39.00%
PERC Water Corporation
Related Party Transaction [Line Items]
Ownership interest held				100.00%