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REGULATORY ASSETS (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Amortization period of other regulatory expense [Abstract]      
Deferred contract costs and other   5 years  
Rate case studies   5 years  
Goodwill   50 years  
Deferred acquisition costs   20 years  
Franchise costs   80 years  
Regulatory assets net of amortization, comprise [Abstract]      
Regulatory assets, net $ 6,314 $ 6,314 $ 6,321
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 2 years 6 months    
Maryland [Member]      
Amortization period of other regulatory expense [Abstract]      
Regulatory rate proceedings 5 years    
Deferred Income Taxes [Member]      
Regulatory assets net of amortization, comprise [Abstract]      
Regulatory assets, net $ 475 $ 475 355
Deferred Contract Costs and Other [Member]      
Regulatory assets net of amortization, comprise [Abstract]      
Regulatory assets, net 258 258 288
Debt Related Costs [Member]      
Regulatory assets net of amortization, comprise [Abstract]      
Regulatory assets, net 4,829 4,829 4,902
Goodwill [Member]      
Regulatory assets net of amortization, comprise [Abstract]      
Regulatory assets, net 269 269 273
Deferred Acquisition and Franchise Costs [Member]      
Regulatory assets net of amortization, comprise [Abstract]      
Regulatory assets, net $ 483 $ 483 $ 503