Note 4 - Fair Value Measurements - Liability Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Details) - Contingent Consideration [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
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| Fair value at the beginning of period | $ 68.4 | $ 38.5 |
| Purchase price contingent consideration (Note 2) | 40.0 | |
| Payments | (88.5) | (28.5) |
| Change in fair value of contingent consideration | 20.1 | 18.4 |
| Contingent consideration payable | $ 68.4 | |
| X | ||||||||||
- Definition Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of purchases of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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| X | ||||||||||
- Details
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