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ACCOUNTS RECEIVABLE - Changes in Accounts Receivable (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024 | Dec. 31, 2023
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Changes in Accounts Receivable [Abstract] |  |  |
Gross accounts receivable | $ 11,398 | $ 11,682 | $ 13,158
Less: provision for expected credit loss | 396 | 343 | 328
Net accounts receivable | 11,002 | 11,339 | 12,830
Customer Accounts Receivable - Water [Member] |  |  |
Changes in Accounts Receivable [Abstract] |  |  |
Gross accounts receivable | 7,517 | 6,824 | 6,573
Customer Accounts Receivable - Wastewater [Member] |  |  |
Changes in Accounts Receivable [Abstract] |  |  |
Gross accounts receivable | 754 | 928 | 869
Customer Accounts Receivable - SLP Plan [Member] |  |  |
Changes in Accounts Receivable [Abstract] |  |  |
Gross accounts receivable | 446 | 470 | 409
Settlement Agreement Receivable - Short Term [Member] |  |  |
Changes in Accounts Receivable [Abstract] |  |  |
Gross accounts receivable | 2,507 | 2,523 | 2,747
Developer Receivable [Member] |  |  |
Changes in Accounts Receivable [Abstract] |  |  |
Gross accounts receivable | 60 | 837 | 2,089
Miscellaneous Receivable [Member] |  |  |
Changes in Accounts Receivable [Abstract] |  |  |
Gross accounts receivable | $ 114 | $ 100 | $ 471

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