Cash, Cash Equivalents and Investments (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Sep. 30, 2025 |
|---|---|---|
| Cash and Cash Equivalents [Line Items] | ||
| Cash and cash equivalents | $ 117,436 | $ 183,049 |
| Short term investments, Amortized cost | 49,442 | 49,316 |
| Gross unrealized gains | 2 | 69 |
| Gross unrealized losses | (41) | 0 |
| Short-term investments, Fair value | 49,403 | 49,385 |
| Total cash, cash equivalents and investments, amortized cost | 166,878 | 232,365 |
| Cash, cash equivalents and investments, fair value | 166,839 | 232,434 |
| U.S. government treasury bills | ||
| Cash and Cash Equivalents [Line Items] | ||
| Short term investments, Amortized cost | 49,442 | 49,316 |
| Gross unrealized gains | 2 | 69 |
| Gross unrealized losses | (41) | 0 |
| Short-term investments, Fair value | 49,403 | 49,385 |
| Cash | ||
| Cash and Cash Equivalents [Line Items] | ||
| Cash and cash equivalents | 42,291 | 32,677 |
| Money market funds | ||
| Cash and Cash Equivalents [Line Items] | ||
| Cash and cash equivalents | $ 75,145 | $ 150,372 |
| X | ||||||||||
- Definition Cash And Cash Equivalents And Short Term Investments Amortized Cost. No definition available.
|
| X | ||||||||||
- Definition Cash, Cash Equivalents, and Short-Term And Long-Term Investments No definition available.
|
| X | ||||||||||
- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|