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Note 4 - Acquisitions - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 01, 2018 | Jan. 02, 2018 | Sep. 05, 2017 | Aug. 01, 2016 | Jul. 01, 2016 | Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 732,667 | $ 597,890 | $ 579,026
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  | 289,492 | 67,851 | $ 253,785
Contingent consideration payable |  |  |  |  |  | 9,200 |  |
Trevigen Inc. [Member] |  |  |  |  |  |  |  |
Current assets, net of cash |  |  |  |  |  | 1,662 |  |
Equipment and other long-term assets |  |  |  |  |  | 53 |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 5,991 |  |
Total assets acquired |  |  |  |  |  | 13,226 |  |
Liabilities |  |  |  |  |  | 387 |  |
Deferred income taxes, net |  |  |  |  |  | 2,195 |  |
Net assets acquired |  |  |  |  |  | 10,644 |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  | $ 10,600 |  |  | 10,644 |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  |  |  |  |
Contingent consideration payable |  |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  | 10,644 |  |
Trevigen Inc. [Member] | Developed Technology Rights [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 5,100 |  |
Trevigen Inc. [Member] | Trade Names [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 160 |  |
Trevigen Inc. [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 260 |  |
Atlanta Biologicals [Member] |  |  |  |  |  |  |  |
Current assets, net of cash |  |  |  |  |  | 15,722 |  |
Equipment and other long-term assets |  |  |  |  |  | 4,901 |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 10,195 |  |
Total assets acquired |  |  |  |  |  | 59,718 |  |
Liabilities |  |  |  |  |  | 90 |  |
Deferred income taxes, net |  |  |  |  |  | 8,354 |  |
Net assets acquired |  |  |  |  |  | 51,274 |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  | 51,274 |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  |  |  |  |
Contingent consideration payable |  |  |  |  |  |  |  |
Net assets acquired |  | $ 51,300 |  |  |  | 51,274 |  |
Atlanta Biologicals [Member] | Developed Technology Rights [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 23,000 |  |
Atlanta Biologicals [Member] | Trade Names [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 2,300 |  |
Atlanta Biologicals [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 3,600 |  |
Eurocell Diagnostics, SAS [Member] |  |  |  |  |  |  |  |
Current assets, net of cash |  |  |  |  |  | 512 |  |
Equipment and other long-term assets |  |  |  |  |  | 188 |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 2,910 |  |
Total assets acquired |  |  |  |  |  | 9,882 |  |
Liabilities |  |  |  |  |  | 483 |  |
Deferred income taxes, net |  |  |  |  |  | 2,070 |  |
Net assets acquired |  |  |  |  |  | 7,329 |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  |  | 5,933 |  |
Business Combination, Consideration Transferred, Liabilities Incurred | $ 1,300 |  |  |  |  | 1,396 |  |
Contingent consideration payable |  |  |  |  |  |  |  |
Net assets acquired | $ 7,300 |  |  |  |  | 7,329 |  |
Eurocell Diagnostics, SAS [Member] | Developed Technology Rights [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |
Eurocell Diagnostics, SAS [Member] | Trade Names [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |
Eurocell Diagnostics, SAS [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 6,272 |  |
Advanced Cell Diagnostics (ACD) [Member] |  |  |  |  |  |  |  |
Current assets, net of cash |  |  |  |  |  | 15,824 |  |
Equipment and other long-term assets |  |  |  |  |  | 6,569 |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 143,967 |  |
Total assets acquired |  |  |  |  |  | 344,560 |  |
Liabilities |  |  |  |  |  | 4,179 |  |
Deferred income taxes, net |  |  |  |  |  | 52,743 |  |
Net assets acquired |  |  |  |  |  | 287,638 |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  | $ 247,000 |  | 247,038 |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  | $ 11,000 |  | 3,600 |  |
Contingent consideration payable |  |  |  |  |  | 37,000 |  |
Net assets acquired |  |  |  |  |  | 287,638 |  |
Advanced Cell Diagnostics (ACD) [Member] | Developed Technology Rights [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 150,000 |  |
Advanced Cell Diagnostics (ACD) [Member] | Trade Names [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 21,900 |  |
Advanced Cell Diagnostics (ACD) [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | 6,300 |  |
Space [Member] |  |  |  |  |  |  |  |
Current assets, net of cash |  |  |  |  |  | 2,128 |  |
Equipment and other long-term assets |  |  |  |  |  | 159 |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  | 3,517 |  |
Total assets acquired |  |  |  |  |  | 12,573 |  |
Liabilities |  |  |  |  |  | 1,445 |  |
Deferred income taxes, net |  |  |  |  |  | 2,125 |  |
Net assets acquired |  |  |  |  |  | 9,003 |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  |  | $ 6,700 | 6,747 |  |
Business Combination, Consideration Transferred, Liabilities Incurred |  |  |  |  | $ 2,300 | 2,256 |  |
Contingent consideration payable |  |  |  |  |  |  |  |
Net assets acquired |  |  |  |  |  | 9,003 |  |
Space [Member] | Developed Technology Rights [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |
Space [Member] | Trade Names [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  |  |  |
Space [Member] | Customer Relationships [Member] |  |  |  |  |  |  |  |
us-gaap_FiniteLivedIntangibleAssetsNetAbstract |  |  |  |  |  |  |  |
Intangible assets |  |  |  |  |  | $ 6,769 |  |

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