REGULATORY ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Reclassification of deferred acquisition costs [Abstract]
Reclassification of deferred acquisition costs from net utility plant	$ 3,700
Reclassification of deferred acquisition costs from contributions in aid of construction	100
Unrecovered reserve for depreciation	$ 4,300
Amortization period of other regulatory expense [Abstract]
Deferred contract costs and other	5 years
Amortization period	5 years
Deferred costs affiliated interest agreement	20 years
Goodwill	50 years
Unrecovered reserve for depreciation (general plant assets)	5 years
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	$ 14,056	$ 14,428
Maximum [Member]
Amortization period of other regulatory expense [Abstract]
Debt related costs	30 years
Minimum [Member]
Amortization period of other regulatory expense [Abstract]
Debt related costs	15 years
Delaware [Member]
Amortization period of other regulatory expense [Abstract]
Regulatory rate proceedings	3 years
Deferred acquisition and franchise costs - Maryland	20 years
Delaware [Member] | Maximum [Member]
Amortization period of other regulatory expense [Abstract]
Deferred acquisition adjustments	62 years
Delaware [Member] | Minimum [Member]
Amortization period of other regulatory expense [Abstract]
Deferred acquisition adjustments	36 years
Maryland [Member] | Maximum [Member]
Amortization period of other regulatory expense [Abstract]
Deferred acquisition and franchise costs	80 years
Maryland [Member] | Minimum [Member]
Amortization period of other regulatory expense [Abstract]
Deferred acquisition and franchise costs	20 years
Deferred Contract Costs and Other [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	$ 307	271
Rate Case Studies [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	132	141
Delaware Rate Proceedings [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	430	474
Deferred Income Taxes [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	418	423
Debt Related Costs [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	3,881	3,969
Deferred Costs Affiliated Interest Agreement [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	1,040	1,054
Goodwill [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	249	251
Deferred Acquisition and Franchise Costs - Maryland [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	379	389
Deferred Acquisition Costs - Delaware [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	228	231
Deferred Acquisition Adjustments - Delaware [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	3,341	3,359
Unrecovered Reserve for Depreciation [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	$ 3,651	$ 3,866