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REGULATORY ASSETS - Regulatory Assets, Net of Amortization, Comprise (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
REGULATORY ASSETS [Abstract]
Regulatory assets, net	$ 13,102	$ 14,428
Deferred Contract Costs and Other [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	165	271
Rate Case Studies [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	114	141
Delaware Rate Proceedings [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	342	474
Deferred Income Taxes [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	408	423
Debt Related Costs [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	3,705	3,969
Deferred Costs Affiliated Interest Agreement [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	1,012	1,054
Goodwill [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	245	251
Deferred Acquisition and Franchise Costs - Maryland [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	361	389
Deferred Acquisition Costs - Delaware [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	222	231
Deferred Acquisition Adjustments - Delaware [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	3,306	3,359
Unrecovered Reserve for Depreciation [Member]
REGULATORY ASSETS [Abstract]
Regulatory assets, net	$ 3,222	$ 3,866

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

The amount for the individual regulatory asset as itemized in a table of regulatory assets as of the end of the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478742/980-340-50-1

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