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REVENUE FROM CONTRACTS WITH CUSTOMERS - NARRATIVE (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Sep. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |
Contract with customer, liability, current | $ 305 |  | $ 1,087
Contract with customer, liability, revenue recognized | $ 1,012 | $ 342 |
Percentage anticipated to be recognized in next 12 months | 100.00% |  |
Revenue, remaining performance obligation (backlog) | $ 4,052 |  |
Capitalized contract cost net, preconstruction | $ 581 |  | $ 689
Minimum |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Contract receivable retainage percentage | 5.00% |  |
Maximum |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Contract receivable retainage percentage | 10.00% |  |

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- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 340 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479483/340-40-50-3 + Details
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479806/606-10-50-8 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479837/606-10-45-2 + Details
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