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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 9 Months Ended
Jun. 30, 2025
Accounting Policies [Abstract]  
Schedule of Restricted Cash
The following table provides a reconciliation of cash and cash equivalents and restricted cash reported in the Unaudited Condensed Consolidated Balance Sheets to the total amounts in the Unaudited Condensed Consolidated Statements of Cash Flows as follows:
(Thousands)June 30,
2025		September 30,
2024		June 30,
2024
Balance Sheet
Cash and cash equivalents$931 $1,017 $22,399 
Restricted cash in other noncurrent assets$1,058 $595 $735 
Statements of Cash Flow
Cash, cash equivalents and restricted cash$1,989 $1,612 $23,134 
Schedule of Natural Gas in Storage
The following table summarizes natural gas in storage, at average cost by segment as of:
June 30, 2025September 30, 2024
($ in thousands)Natural Gas in StorageBcfNatural Gas in StorageBcf
NJNG$131,098 22.7 $177,655 30.8 
ES36,530 13.7 21,378 13.1 
S&T528 0.2 92 — 
Total$168,157 36.6 $199,125 43.9 
Schedule of Software Costs Included in the Consolidated Financial Statements The following tables present the software costs included in the Unaudited Condensed Consolidated Financial Statements:
(Thousands)June 30,
2025		September 30,
2024
Balance Sheets
Utility plant, at cost$133,498 $133,158 
Construction work in progress$64,854 $26,659 
Nonutility plant and equipment, at cost$344 $344 
Accumulated depreciation and amortization, utility plant$(22,357)$(13,632)
Accumulated depreciation and amortization, nonutility plant and equipment$(56)$(48)
Software costs$10,784 $10,522 

Three Months EndedNine Months Ended
June 30,June 30,
Statements of Operations2025202420252024
Operation and maintenance$1,335 $4,048 $5,221 $9,975 
Depreciation and amortization$3,190 $1,507 $8,733 $3,761 
Schedule of Accumulated Other Comprehensive (Loss) Income
The following table presents the changes in the components of accumulated other comprehensive (loss) income, net of related tax effects during the three months ended June 30, 2025 and 2024:
(Thousands)Cash Flow HedgesPostemployment Benefit ObligationTotal
Balance as of March 31, 2025$(5,689)$(697)$(6,386)
Other comprehensive income (loss), net of tax
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(79), $58, $(21), respectively
264 (196)(1)68 
Balance as of June 30, 2025$(5,425)$(893)$(6,318)
Balance as of March 31, 2024$(6,743)$7,065 $322 
Other comprehensive income, net of tax
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(79), $112 and $33, respectively
264 (369)(1)(105)
Balance as of June 30, 2024$(6,479)$6,696 $217 
(1)Included in the computation of net periodic pension cost, a component of O&M on the Unaudited Condensed Consolidated Statements of Operations.

The following table presents the changes in the components of accumulated other comprehensive (loss) income, net of related tax effects during the nine months ended June 30, 2025 and 2024:
(Thousands)Cash Flow HedgesPostemployment Benefit ObligationTotal
Balance as of September 30, 2024$(6,215)$(306)$(6,521)
Other comprehensive income (loss), net of tax
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(238), $174 and $(64), respectively
790 (587)(1)203 
Balance as of June 30, 2025$(5,425)$(893)$(6,318)
Balance as of September 30, 2023$(7,269)$(2,690)$(9,959)
Other comprehensive income, net of tax
Other comprehensive income, before reclassifications, net of tax of $0, $(3,020) and $(3,020), respectively
— 9,992 9,992 
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(238), $184 and $(54), respectively
790 (606)(1)184 
Net current-period other comprehensive income, net of tax of $(238), $(2,836) and $(3,074), respectively
790 9,386 10,176 
Balance as of June 30, 2024$(6,479)$6,696 $217 
(1)Included in the computation of net periodic pension cost, a component of O&M on the Unaudited Condensed Consolidated Statements of Operations.