REGULATORY ASSETS (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
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
Amortization period of other regulatory expense [Abstract]
Deferred contract costs and other	5 years
Rate case studies	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	$ 14,873	$ 7,289
Maximum [Member]
Amortization period of other regulatory expense [Abstract]
Debt related cost	30 years
Minimum [Member]
Amortization period of other regulatory expense [Abstract]
Debt related cost	15 years
Delaware [Member]
Amortization period of other regulatory expense [Abstract]
Regulatory rate proceedings	3 years
Deferred acquisition costs	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	$ 290	209
Rate Case Studies [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	150	166
Delaware Rate Proceedings [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	536	355
Deferred Income Taxes [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	429	444
Debt Related Costs [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	4,057	4,322
Deferred Costs Affiliated Interest Agreement [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	1,068	1,110
Goodwill [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	253	258
Deferred Acquisition and Franchise Costs - Maryland [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	398	425
Deferred Acquisition Costs - Delaware [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	234	0
Deferred Acquisition Adjustments - Delaware [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	3,377	0
Unrecovered Reserve for Depreciation [Member]
Regulatory assets net of amortization, comprise [Abstract]
Regulatory assets, net	$ 4,081	$ 0