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Note 5 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019 | May 31, 2021 | Apr. 06, 2021 | Dec. 31, 2020 | Jun. 04, 2019 | Oct. 31, 2018 | Jul. 02, 2018
Interest Expense, Total |  |  |  | $ 13,952 | $ 19,197 | $ 21,705 |  |  |  |  |  |
Nonoperating Income (Expense), Total |  |  |  | (89,121) | 119,058 | (34,704) |  |  |  |  |  |
Income Tax Expense (Benefit), Total |  |  |  | 8,590 | 47,181 | $ 15,943 |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  |  |  | 29,400 |  |  |  |  |  |  |  |
Acquisition of Asuragen, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Total |  |  |  | 18,300 |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  | 105,000 |  |  |  | $ 105,000 |  |  |  |
QT Holdings Corporation [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  | 51,000 |  |  |  |  |  |  |  | $ 51,000
B-MoGen [Member] |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  | 38,000 |  |  |  |  |  | $ 38,000 |  |
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense, Total |  |  |  | 8,598 |  |  |  |  |  |  |  |
Nonoperating Income (Expense), Total |  |  |  | 512 |  |  |  |  |  |  |  |
Designated as Hedging Instrument [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI Attributable to Parent [Member] |  |  |  |  |  |  |  |  |  |  |  |
Interest Expense, Total |  |  |  | 8,600 | 3,500 |  |  |  |  |  |  |
Nonoperating Income (Expense), Total |  |  |  | (500) |  |  |  |  |  |  |  |
Income Tax Expense (Benefit), Total |  |  |  | (2,100) |  |  |  |  |  |  |  |
Forward Starting Swap [Member] | Other Current Liabilities [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |  |  |  |  |  |  |  |  |
Derivative Liability, Current |  |  |  | 800 |  |  |  |  |  |  |  |
Forward Starting Swap [Member] | Cash Flow Hedging [Member] |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  |  |  |  |  | $ 380,000 |
Derivative Notional Amount, Decrease in Period |  |  | $ 100,000 |  |  |  |  |  |  |  |  |
Forward Starting Swap [Member] | Cash Flow Hedging [Member] | Other Noncurrent Liabilities [Member] |  |  |  |  |  |  |  |  |  |  |  |
Derivative Notional Amount, Dedesignated |  |  |  |  | 80,000 |  |  |  | $ 80,000 |  |  |
Hedging Liabilities, Noncurrent |  |  |  | 7,600 |  |  |  |  |  |  |  |
Forward Starting Swap [Member] | Cash Flow Hedging [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |
Derivative Notional Amount, Decrease in Period | $ 200,000 | $ 80,000 |  |  |  |  |  |  |  |  |  |
New Forward Starting Swap [Member] | Cash Flow Hedging [Member] |  |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  | $ 200,000 |  |  |  |  |
New Forward Starting Swap [Member] | Cash Flow Hedging [Member] | Other Noncurrent Assets [Member] |  |  |  |  |  |  |  |  |  |  |  |
Hedging Assets, Noncurrent, Total |  |  |  | 300 |  |  |  |  |  |  |  |
CCXI [Member] |  |  |  |  |  |  |  |  |  |  |  |
Investments, Total |  |  |  | 6,600 | 6,600 |  |  |  |  |  |  |
Investments, Fair Value Disclosure, Total |  |  |  | $ 1,400 | $ 8,000 |  |  |  |  |  |  |

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