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Note 6 - Other Comprehensive Income (Loss) - Changes in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Balance | $ 275,763 | $ 315,163
Unrealized (loss) on available-for-sale securities | (158) | 390
Unrealized (loss) on available-for-sale securities | 33 | (99)
Unrealized (loss) gain on available-for-sale investments | (125) | 291
Other comprehensive (loss) | (1,096) | 1,020
Unrealized (loss) on foreign currency translation | (1,159) | 915
Unrealized (loss) on foreign currency translation | 188 | (186)
Unrealized (loss) on foreign currency translation | (971) | 729
Balance | 267,435 | 300,095
Other comprehensive (loss) | (1,317) | 1,305
Other comprehensive (loss) | 221 | (285)
Other comprehensive (loss) | (1,096) | 1,020
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] |  |
Balance | 66 |
Other comprehensive (loss) | (125) |
Balance | (59) |
Other comprehensive (loss) | (125) |
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |
Balance | 1,013 |
Other comprehensive (loss) | (971) |
Balance | 42 |
Other comprehensive (loss) | (971) |
AOCI Attributable to Parent [Member] |  |
Balance | 1,079 | (544)
Other comprehensive (loss) | (1,096) |
Balance | (17) | $ 476
Other comprehensive (loss) | $ (1,096) |

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