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v3.20.1

Basis of Presentation (Details) | Mar. 31, 2020 USD ($) | Oct. 01, 2019 lease
--- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Quarterly operating lease obligation | $ | $ 3,240 |
ASU 2016-02 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Number of operating leases | lease |  | 1

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- Definition Amount of contractual obligation due quarterly, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
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Namespace Prefix: | rgco_
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Balance Type: | credit
Period Type: | instant

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- Definition Number of operating leases + References No definition available. + Details
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Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Period Type: | duration

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- Details
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Data Type: | na
Balance Type: |
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