RETIREMENT PLANS - FAIR VALUE (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Pension plan assets at the fair value
Fair value measurements	$ 11,982	$ 11,316
Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	11,982	11,316
Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
Cash
Pension plan assets at the fair value
Fair value measurements	263	1,539
Cash | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	263	1,539
Cash | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Cash | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
Corporate bonds
Pension plan assets at the fair value
Fair value measurements		1
Corporate bonds | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements		1
Corporate bonds | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements		0
Corporate bonds | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements		0
U.S. treasury and government securities
Pension plan assets at the fair value
Fair value measurements	709	561
U.S. treasury and government securities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	709	561
U.S. treasury and government securities | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
U.S. treasury and government securities | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
Fixed income exchange-traded funds
Pension plan assets at the fair value
Fair value measurements	3,102	3,223
Fixed income exchange-traded funds | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	3,102	3,223
Fixed income exchange-traded funds | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Fixed income exchange-traded funds | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
Preferred securities
Pension plan assets at the fair value
Fair value measurements	47	67
Preferred securities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	47	67
Preferred securities | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Preferred securities | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	0	0
Equity securities exchange-traded funds
Pension plan assets at the fair value
Fair value measurements		408
Equity securities exchange-traded funds | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements		408
Equity securities exchange-traded funds | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements		0
Equity securities exchange-traded funds | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements		0
Equities
Pension plan assets at the fair value
Fair value measurements	7,861	5,517
Equities | Quoted Prices in Active Markets (Level 1)
Pension plan assets at the fair value
Fair value measurements	7,861	5,517
Equities | Significant Other Observable Inputs (Level 2)
Pension plan assets at the fair value
Fair value measurements	0	0
Equities | Significant Unobservable Inputs (Level 3)
Pension plan assets at the fair value
Fair value measurements	$ 0	$ 0