Description of Business, Basis of Presentation, Significant Accounting Policies, and Recent Accounting Pronouncements - Significant Accounting Policies (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Required payment period	15 days
Total revenue	$ 55,758,000	$ 52,692,000
Percentage of ICFA payments, recorded as HUF liability	70.00%
Percentage of overall ICFA funds, recorded as deferred revenue	30.00%
Deferred tax assets, valuation allowance	$ 0	0
Amortization of debt issuance costs and discounts	$ 100,000	100,000
Refundable AIAC, annual payment, period used in calculation	22 years
Refundable AIAC carrying value	$ 157,100,000	127,900,000
AIAC balance transfers to CIAC	0	0
Other Water Revenues | Connection Fees
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total revenue	$ 300,000	$ 300,000