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Note 11 - Segment Information - Financial Information Relating to Reportable Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Net sales | $ 180,254 | $ 163,973 | $ 154,153 | $ 144,613 | $ 156,578 | $ 144,037 | $ 131,807 | $ 130,581 | $ 642,993 | $ 563,003 | $ 499,023
Operating income |  |  |  |  |  |  |  |  | 136,178 | 120,584 | 150,593
Costs recognized upon sale of acquired inventory |  |  |  |  |  |  |  |  | (2,455) | (3,037) | (5,431)
Amortization of intangibles |  |  |  |  |  |  |  |  | (47,076) | (44,393) | (29,395)
Corporate general, selling and administrative expenses |  |  |  |  |  |  |  |  | (240,636) | (200,443) | (140,879)
Acquisition Related [Member] |  |  |  |  |  |  |  |  |  |  |
Corporate general, selling and administrative expenses |  |  |  |  |  |  |  |  | (6,715) | (4,952) | (5,007)
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  | 245,376 | 213,386 | 202,617
Intersegment Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (536) | (104) | (125)
Segment Reconciling Items [Member] |  |  |  |  |  |  |  |  |  |  |
Acquisition related expenses |  |  |  |  |  |  |  |  | (24,429) | (25,789) | (2,761)
Restructuring costs |  |  |  |  |  |  |  |  | (376) |  |
Stock-based compensation |  |  |  |  |  |  |  |  | (28,240) | (14,631) | (9,430)
Biotechnology [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 421,536 | 364,504 | 317,340
Operating income |  |  |  |  |  |  |  |  | 199,100 | 175,163 | 168,613
Protein Platforms [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 111,885 | 91,464 | 77,324
Operating income |  |  |  |  |  |  |  |  | 17,996 | 9,648 | 3,592
Diagnostics [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 110,108 | 107,139 | 104,484
Operating income |  |  |  |  |  |  |  |  | $ 28,280 | $ 28,575 | $ 30,412

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- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e1043-128460 + Details
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