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SUPPLEMENTAL CASH FLOW INFORMATION (Tables) | 12 Months Ended
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Sep. 30, 2020
Supplemental Cash Flow Information [Abstract] |
Changes in Working Capital Items as Presented in the Consolidated Statements of Cash Flows | Changes in working capital items as presented in the Consolidated Statements of Cash Flows consisted of the following:
| 2020 |  | 2019 |  | 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) |
| 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 |
| 31,139 |  |  | (32,408) |  |  | 10,018 |
Net change | $ | 46,367 |  |  | $ | (12,482) |  |  | $ | (9,934) |

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