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REGULATORY ASSETS (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021 | Dec. 31, 2020
Regulatory Assets [Abstract] |  |  |
Cash received for bond issuance |  |  | $ 30,000
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 | $ 6,437 | $ 6,437 | 6,473
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 | $ 359 | $ 359 | 370
Deferred Contract Costs and Other [Member] |  |  |
Regulatory assets net of amortization, comprise [Abstract] |  |  |
Regulatory assets, net | 301 | 301 | 46
Debt Related Costs [Member] |  |  |
Regulatory assets net of amortization, comprise [Abstract] |  |  |
Regulatory assets, net | 4,989 | 4,989 | 5,233
Goodwill [Member] |  |  |
Regulatory assets net of amortization, comprise [Abstract] |  |  |
Regulatory assets, net | 275 | 275 | 281
Deferred Acquisition and Franchise Costs [Member] |  |  |
Regulatory assets net of amortization, comprise [Abstract] |  |  |
Regulatory assets, net | $ 513 | $ 513 | $ 543

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- Definition Represents amortization period of debt related cost. + References No definition available. + Details
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- Definition Period over which regulatory noncurrent asset for deferred acquisition costs amortized. + References No definition available. + Details
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- Definition Period over which regulatory noncurrent asset for deferred franchise costs amortized. + References No definition available. + Details
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- Definition The cash inflow from amounts received from a long-term debt instrument secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3255-108585 + Details
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- Definition Amortization period for the recovery of regulatory asset, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6499975&loc=d3e44250-110382 + Details
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