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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2018
Current assets: |  |  |
Accounts receivable | $ 24,055 | $ 8,779 | $ (790)
Inventories | 5,976 | 830 | (2,869)
Other current assets | (14,803) | 10,317 | (16,293)
Total change in current assets | 15,228 | 19,926 | (19,952)
Current liabilities: |  |  |
Trade accounts payable | 8,363 | 3,715 | 2,516
Accrued compensation | 15,512 | (8,832) | (10,940)
Accrued income taxes | (2,384) | (5,416) | (9,973)
Other current liabilities | 9,648 | (21,875) | 28,415
Total change in current liabilities | 31,139 | (32,408) | 10,018
Net change | $ 46,367 | $ (12,482) | $ (9,934)

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