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Note 3 - Supplemental Balance Sheet and Cash Flow Information - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Balance | $ 579,026 | $ 430,882
Acquisitions (Note 2) | 19,096 | 147,484
Prior year acquisitions |  | 1,809
Currency translation | (232) | (1,149)
Balance | 597,890 | 579,026
Biotechnology [Member] |  |
Balance | 254,930 | 108,723
Acquisitions (Note 2) | 16,186 | 147,484
Prior year acquisitions |  |
Currency translation | 759 | (1,277)
Balance | 271,875 | 254,930
Protein Platforms [Member] |  |
Balance | 220,826 | 218,889
Acquisitions (Note 2) |  |
Prior year acquisitions |  | 1,809
Currency translation | (815) | 128
Balance | 220,011 | 220,826
Diagnostics [Member] |  |
Balance | 103,270 | 103,270
Acquisitions (Note 2) | 2,910 |
Prior year acquisitions |  |
Currency translation | (176) |
Balance | $ 106,004 | $ 103,270

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