Fair Value Measures - Summary of Unrealized Losses Recognized Related to Equity Securities (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Fair Value Disclosures [Abstract] | ||||
| Net loss recognized during the period on equity securities | $ 53 | $ 23 | $ 46 | $ 135 |
| Less net loss recognized during the period on equity securities sold during the period | 0 | 0 | 0 | 0 |
| Unrealized loss recognized during the reporting period on equity securities still held at the reporting date | $ 53 | $ 23 | $ 46 | $ 135 |