REVENUE RECOGNITION - Contract Balances (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Capitalized Contract Cost [Line Items]
Accounts receivable	$ 2,488	$ 2,127
Deferred revenue - ICFA	20,870	19,035
Refund liability - regulated	0	762
Total contract liabilities	20,870	19,797
Water Services
Capitalized Contract Cost [Line Items]
Accounts receivable	1,409	1,139
Wastewater and recycled water services
Capitalized Contract Cost [Line Items]
Accounts receivable	$ 1,079	$ 988