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REVENUE FROM CONTRACTS WITH CUSTOMERS REVENUE FROM CONTRACTS WITH CUSTOMERS - NARRATIVE (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2020 | Mar. 31, 2019 | Sep. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Contract with customer, liability, current | $ 1,141 | $ 1,141 |  | $ 1,633
Contract with customer, liability, revenue recognized |  | 707 | $ 22 |
Revenue, remaining performance obligation (backlog) | $ 2,458 | $ 2,458 |  | $ 2,866
Percentage anticipated to be recognized in next 12 months | 89.00% | 89.00% |  | 79.00%
Capitalized contract cost net, preconstruction | $ 199 | $ 199 |  | $ 296
Contract with customer, liability, cumulative catch-up adjustment to revenue, amount reversed | (979) | (733) |  |
Contract with customer, liability, margin decrease, change in measure of progress | $ 750 | $ 750 |  |
Minimum |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Contract receivable retainage percentage | 5.00% | 5.00% |  |
Maximum |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Contract receivable retainage percentage | 10.00% | 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 -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
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- Definition Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in measure of progress which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045 + Details
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