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CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS (Tables) | 12 Months Ended
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Sep. 30, 2023
Cash and Cash Equivalents [Abstract] |
Schedule of cash, cash equivalents and short-term investments | Cash, cash equivalents and short-term investments consisted of the following as of September 30, 2023:
(dollar amounts in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value
Current assets: |  |  |  |  |  |  |
Cash | $ | 37,292 |  |  | $ | — |  |  | $ | — |  |  | $ | 37,292 |
Cash equivalents: |  |  |  |  |  |  |
Money market funds (1) | 202,113 |  |  | — |  |  | (10) |  |  | 202,103 |
Time deposits (2) | 290,007 |  |  | — |  |  | — |  |  | 290,007 |
Total cash and cash equivalents | $ | 529,412 |  |  | $ | — |  |  | $ | (10) |  |  | $ | 529,402 |
Short-term investments: |  |  |  |  |  |  |
Time deposits (2) | $ | 230,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 230,000 |
Total short-term investments | $ | 230,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 230,000 |
Total cash, cash equivalents, and short-term investments | $ | 759,412 |  |  | $ | — |  |  | $ | (10) |  |  | $ | 759,402 |
(1)The fair value was determined using unadjusted prices in active, accessible markets for identical assets, and as such they were classified as Level 1 assets in the fair value hierarchy. (2)All short-term investments were classified as available-for-sale and the fair value approximates cost basis. The Company did not recognize any realized gains or losses on the sale of investments during the fiscal years ended 2023 and 2022. Cash, cash equivalents, restricted cash and short-term investments consisted of the following as of October 1, 2022:
(dollar amounts in thousands) | Amortized Cost |  | Unrealized Gains |  | Unrealized Losses |  | Estimated Fair Value
Current assets: |  |  |  |  |  |  |
Cash | $ | 173,402 |  |  | $ | — |  |  | $ | — |  |  | $ | 173,402 |
Cash equivalents: |  |  |  |  |  |  |
Money market funds (1) | 157,145 |  |  | — |  |  | (20) |  |  | 157,125 |
Time deposits (2) | 225,010 |  |  | — |  |  | — |  |  | 225,010 |
Total cash and cash equivalents | $ | 555,557 |  |  | $ | — |  |  | $ | (20) |  |  | $ | 555,537 |
Short-term investments: |  |  |  |  |  |  |
Time deposits (2) | 220,000 |  |  | — |  |  | — |  |  | 220,000 |
Total short-term investments | $ | 220,000 |  |  | $ | — |  |  | $ | — |  |  | $ | 220,000 |
Total cash, cash equivalents, restricted cash and short-term investments | $ | 775,557 |  |  | $ | — |  |  | $ | (20) |  |  | $ | 775,537 |
(1)The fair value was determined using unadjusted prices in active, accessible markets for identical assets, and as such they were classified as Level 1 assets in the fair value hierarchy. (2)All short-term investments were classified as available-for-sale and the fair value approximates cost basis. The Company did not recognize any realized gains or losses on the sale of investments during the fiscal years ended 2023 and 2022.

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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