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BUSINESS COMBINATIONS (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 21, 2019 | Nov. 01, 2018 | Mar. 31, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill |  |  |  | $ 45,653 | $ 82,786 | $ 64,777 | $ 51,705
DrillScan Energy |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration given | $ 32,700 |  |  |  |  |  |
Contingent consideration | 17,700 |  |  |  |  |  |
Fair value of total assets acquired | 36,300 |  |  |  |  |  |
Fair value of total liabilities assumed | 3,600 |  |  |  |  |  |
Goodwill | 14,900 |  |  |  |  |  |
Identifiable intangible assets | $ 19,100 |  |  |  |  |  |
Increase in goodwill |  |  | $ 1,200 |  |  |  |
Angus Jamieson Consulting |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Consideration given |  | $ 3,400 |  |  |  |  |
Goodwill |  | $ 3,100 |  |  |  |  |

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