| Note 3 - Selected Balance Sheet Data - Changes to Carrying Amount of Net Intangible Assets (Details) $ in Thousands | 3 Months Ended | 
|---|---|
| Sep. 30, 2020  USD ($) | |
| Beginning balance | $ 516,545 | 
| Finite-lived Intangible Assets Acquired | 0 | 
| Other additions | 5,135 | 
| Amortization expense | (15,575) | 
| Currency translation | 1,486 | 
| Ending balance | $ 507,591 | 
| X | ||||||||||
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- Definition Amount of other additions lacking physical substance with a definite life. No definition available. 
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| X | ||||||||||
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life. No definition available. 
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| X | ||||||||||
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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