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Note 5 - Fair Value Measurements (Details Textual) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 31, 2022 | Oct. 31, 2021 | Oct. 31, 2020 | Jun. 30, 2020 | Jul. 01, 2019 | Jun. 30, 2019 | Jun. 04, 2019 | Oct. 31, 2018 | Aug. 01, 2018 | Jul. 02, 2018
Business Combination, Liabilities Arising from Contingencies, Amount Recognized |  |  |  |  | $ 14.6 |  |  |  |  |
Exosome Diagnostics, Inc [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  | $ 325.0 |  |  |  |  | $ 325.0 |
Business Combination, Liabilities Arising from Contingencies, Amount Recognized |  |  |  |  |  |  |  |  | $ 3.8 |
QT Holdings Corporation [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  | 51.0 |  |  |  |  |  | $ 51.0
Business Combination, Liabilities Arising from Contingencies, Amount Recognized |  |  |  |  |  |  |  |  |  | $ 5.3
B-MoGen [Member] |  |  |  |  |  |  |  |  |  |
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High |  |  |  | 38.0 |  |  | $ 38.0 |  |  |
Business Combination, Liabilities Arising from Contingencies, Amount Recognized |  |  |  |  |  |  | $ 5.5 |  |  |
Embedded Derivative Financial Instruments [Member] |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax |  |  |  | 3.5 |  |  |  |  |  |
Embedded Derivative Financial Instruments [Member] | Cash Flow Hedging [Member] |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount |  |  |  |  |  |  |  | $ 380.0 |  |
Embedded Derivative Financial Instruments [Member] | Cash Flow Hedging [Member] | Other Noncurrent Liabilities [Member] |  |  |  |  |  |  |  |  |  |
Derivative Notional Amount, Dedesignated |  |  |  | 80.0 |  |  |  |  |  |
Embedded Derivative Financial Instruments [Member] | Cash Flow Hedging [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |
Derivative Notional Amount, Decrease in Period | $ 200.0 | $ 80.0 | $ 100.0 |  |  |  |  |  |  |
CCXI [Member] |  |  |  |  |  |  |  |  |  |
Investments, Total |  |  |  | 6.6 |  | $ 18.8 |  |  |  |
Investments, Fair Value Disclosure, Total |  |  |  | $ 8.0 |  |  |  |  |  |

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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
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