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Note 3 - Discontinued Operations - Schedule of Disposal Groups (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Net income from discontinued operations | $ 0 | $ (1,374) | $ 2,144,145
Discontinued Operations, Disposed of by Sale [Member] | Semiconductor Automation Business [Member] |  |  |
Disposal group, revenue |  |  | 264,430
Disposal group, cost of revenue |  |  | 152,324
Gross profit |  |  | 112,106
Research and development |  |  | 18,486
Selling, general and administrative |  |  | 30,622
Restructuring charges |  |  | 0
Total operating expenses |  |  | 49,108
Operating income |  |  | 62,998
Gain on divestiture |  |  | 2,561,820
Income before income taxes |  |  | 2,624,818
Income tax expense |  |  | 480,673
Net income from discontinued operations | $ (1,400) |  | 2,144,145
Capital expenditures |  |  | 2,862
Discontinued Operations, Disposed of by Sale [Member] | Semiconductor Automation Business [Member] | Product [Member] |  |  |
Disposal group, revenue |  |  | 244,962
Disposal group, cost of revenue |  |  | 141,165
Discontinued Operations, Disposed of by Sale [Member] | Semiconductor Automation Business [Member] | Service [Member] |  |  |
Disposal group, revenue |  |  | 19,468
Disposal group, cost of revenue |  |  | $ 11,159

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