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Note 5 - Rates and Regulatory Matters (Details Textual) |  |  |  |  | 3 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jul. 07, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 21, 2022 USD ($) | Dec. 02, 2022 USD ($) | Dec. 31, 2023 USD ($) | Sep. 30, 2022 USD ($) | Jul. 19, 2022 | Jun. 02, 2022
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  | $ 8,550,000 |  |  |  |
Regulated Operating Revenue, SAVE Revenue |  |  |  | $ 4,050,000.00 |  |  |  |
Public Utilities, Approved Rate Increase (Decrease), Amount |  |  | $ 7,450,000 |  |  |  |  |
SAVE Plan and Rider for Recovery Costs, Term (Year) | 5 years | 5 years |  |  |  |  |  |
Recovery Costs, SAVE Eligible Expenses |  | $ 8,500,000 |  |  |  |  |  |
Investments | $ 49,500,000 | $ 49,500,000 |  |  |  |  |  |
SAVE Annual Revenues | $ 366,000 |  |  |  |  |  |  |
Number of Locations, Natural Gas Delivery Assets, Requested Acquisition |  |  |  |  |  |  |  | 5
Number of Locations, Natural Gas Delivery Assets, Approved Acquisition |  |  |  |  |  |  | 2 |
Natural Gas Delivery Assets [Member] | Housing Authority Management [Member] |  |  |  |  |  |  |  |
Asset Acquisition, Recognized Pre-tax Gain |  |  |  |  | $ 311,000 | $ 219,000 |  |

X
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- Definition Number of locations where the request for asset acquisition of natural gas delivery has been approved. + References No definition available. + Details
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- Definition Number of locations where the acquisition of assets related to natural gas delivery has been requested. + References No definition available. + Details
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- Definition The represented annual revenues under the SAVE program. + References No definition available. + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(h)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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