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Cash, Cash Equivalents and Marketable Securities (Tables) | 12 Months Ended
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Sep. 30, 2021
Cash and Cash Equivalents [Abstract] |
Cash, Cash Equivalents and Investments | The following is a summary of cash, cash equivalents and marketable securities at September 30, 2021 and 2020:
| September 30, 2021 |  | September 30, 2020
| Amortized Cost |  | Fair Value |  | Amortized Cost |  | Fair Value
| (In thousands)
Cash and Cash Equivalents: |  |  |  |  |  |  |
Cash | $ | 195,160 |  |  | $ | 195,160 |  |  | $ | 122,119 |  |  | $ | 122,119 |
Money market funds | 194 |  |  | 194 |  |  | 35,275 |  |  | 35,275 |
Total | $ | 195,354 |  |  | $ | 195,354 |  |  | $ | 157,394 |  |  | $ | 157,394 |
Long-term Marketable Securities: |  |  |  |  |  |  |
Marketable securities | $ | 23,836 |  |  | $ | 31,884 |  |  | $ | 20,195 |  |  | $ | 25,513 |

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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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