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Investments | 6 Months Ended
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Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract] |
Investments | INVESTMENTS The Company’s investments consisted of the following:
| As of March 31, 2024
| (in thousands)
| Adjusted Basis |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Available-for-sale securities | $ | 396,249 |  |  | $ | 11 |  |  | $ | (850) |  |  | $ | 395,410 |
Total current investments | $ | 396,249 |  |  | $ | 11 |  |  | $ | (850) |  |  | $ | 395,410 |
| As of September 30, 2023
| (in thousands)
| Adjusted Basis |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Fair Value
Available-for-sale securities | $ | 295,699 |  |  | $ | 3 |  |  | $ | (2,967) |  |  | $ | 292,735 |
Total current investments | $ | 295,699 |  |  | $ | 3 |  |  | $ | (2,967) |  |  | $ | 292,735 |
The Company has determined that the available-for-sale securities that were in an unrealized loss position did not have any credit loss impairment as of March 31, 2024 and 2023.

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