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Accumulated Other Comprehensive Loss (Tables) | 12 Months Ended
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Sep. 30, 2021
Stockholders Equity Note [Abstract] |
Accumulated Other Comprehensive Loss | Accumulated other comprehensive loss consisted of the following (in thousands):
|  | Unrealized Losses on Available-for-Sale Securities |  |  | Foreign Currency Translation Adjustments |  |  | Total |
Balance at October 1, 2019 |  | $ | — |  |  | $ | (15,757 | ) |  | $ | (15,757 | )
Other comprehensive loss |  |  | — |  |  |  | (941 | ) |  |  | (941 | )
Balance at September 30, 2020 |  | $ | — |  |  |  | (16,698 | ) |  |  | (16,698 | )
Other comprehensive income (loss) |  |  | (15 | ) |  |  | 393 |  |  |  | 378 |
Balance at September 30, 2021 |  | $ | (15 | ) |  | $ | (16,305 | ) |  | $ | (16,320 | )

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