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COMMITMENTS AND CONTINGENCIES (Details)
gal in Millions
 1 Months Ended 12 Months Ended
Oct. 31, 1997
Dec. 31, 2015
USD ($)
a
gal
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2003
Leases [Abstract]          
Easement payments   $ 35,000 $ 34,000 $ 33,000  
Summary of minimum annual rental payments related to operating leases [Abstract]          
2016   75,000      
2017   54,000      
2018   55,000      
2019   57,000      
2020   58,000      
2021 through 2043   1,475,000      
Total   1,774,000      
Summary of minimum annual purchase commitments for all interconnection agreements [Abstract]          
2016   3,829,000      
2017   3,819,000      
2018   3,819,000      
2019   3,819,000      
2020   3,829,000      
2021   3,819,000      
Total   22,934,000      
Expenses for purchased water   4,000,000 4,000,000 4,000,000  
Other Commitments [Abstract]          
Tank painting expense   329,000 342,000 377,000  
Artesian Water [Member]          
Leases [Abstract]          
Operating lease period 33 years        
Rental payments   $ 16,000 15,900 $ 15,700  
Interconnections [Abstract]          
Multiplier to estimate minimum purchase requirements for the year | gal   3      
Minimum purchase requirements of water | gal   1,459      
Minimum reduced purchase requirements of water | gal   1,095      
Other Commitments [Abstract]          
Agreement period   3 years   3 years  
Commitment amount   $ 113,000   $ 804,000  
Summary of other commitment [Abstract]          
2016   4,235,000      
2017   1,830,000      
2018   1,410,000      
Total   7,475,000      
Artesian Resources [Member]          
Leases [Abstract]          
Easement agreement period         40 years
Artesian Wastewater [Member]          
Leases [Abstract]          
Rental payments   $ 43,000 $ 43,000 $ 41,700  
Adjustment Factor   2.00%      
Area of land use as per perpetual agreement (in acres) | a   460      
Minimum rentals payment per year   $ 40,000      
Termination Period   180 days