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RETIREMENT PLANS - FAIR VALUE (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Sep. 30, 2021
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Pension plan assets at the fair value |  |
Fair value measurements | $ 11,316 | $ 12,594
Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 11,316 | 12,594
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 | 1,539 | 25
Cash | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 1,539 | 25
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 | 1
Corporate bonds | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 1 | 1
Corporate bonds | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Corporate bonds | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
U.S. treasury and government securities |  |
Pension plan assets at the fair value |  |
Fair value measurements | 561 |
U.S. treasury and government securities | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 561 |
U.S. treasury and government securities | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 |
U.S. treasury and government securities | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 |
Fixed income exchange-traded funds |  |
Pension plan assets at the fair value |  |
Fair value measurements | 3,223 | 3,809
Fixed income exchange-traded funds | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 3,223 | 3,809
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 | 67 | 48
Preferred securities | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 67 | 48
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 | 459
Equity securities exchange-traded funds | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 408 | 459
Equity securities exchange-traded funds | Significant Other Observable Inputs (Level 2) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Equity securities exchange-traded funds | Significant Unobservable Inputs (Level 3) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 0 | 0
Equities |  |
Pension plan assets at the fair value |  |
Fair value measurements | 5,517 | 8,252
Equities | Quoted Prices in Active Markets (Level 1) |  |
Pension plan assets at the fair value |  |
Fair value measurements | 5,517 | 8,252
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

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- Definition Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(02) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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