| Note 2 - Selected Balance Sheet Data | 6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2016 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Notes to Financial Statements | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Supplemental Balance Sheet Disclosures [Text Block] | N ote  2.Selected Balance Sheet Data : Available-For-Sale Investments: The fair value of the Company's available-for-sale investments at   December 31 ,  2016and  June 30, 2016were $56.6million and $31.6million, respectively. The increase was caused by the addition of $5.1million in corporate bond securities held by Advanced Cell Diagnostics (ACD), and the investment of $1.3million of available cash in China into certificates of deposit. The remaining difference is due to a $17 .7million change in the fair value of the Company's investment in ChemoCentryx, Inc. (CCXI). The amortized cost basis of the Company's investment in CCXI at  December 31, 2016and  June 30, 2016was $29.5 Inventories: Inventories consist of (in thousands): 
 At   December 31, 2016,the Company had $66.1million of inventory compared to $57.1million as of  June 30, 2016.The increase from  June 30is primarily due to $9.6million of additional inventory at ACD which was acquired on  August 1, 2016.At both  December 31, 2016and  June 30, 2016,the Company had approximately $24 Property and Equipment: Property and equipment consist of (in thousands): 
 Intangible Assets: Intangible assets consist of (in thousands):          
 Changes to the carrying amount of net intangible assets for the  sixmonths ended  December 31, 2016consist of (in thousands): 
 The estimated future amortization expense for intangible assets as of   December 31, 2016is as follows (in thousands): 
 G oodwill: Changes to the carrying amount of goodwill for the  sixmonths ended  December 31, 2016consist of (in thousands): 
 We evaluate the carrying value of goodwill in the  fourthquarter of each year and between annual evaluations if events occur or circumstances change that would indicate a possible impairment. The Company used a “step zero”qualitative test to assess twoof its three fourthquarter for fiscal year 2016.The estimated fair values of these reporting units using “step zero”testing substantially exceeded their respective carrying values. The company elected to utilize a “step one”quantitative test for the Protein Platforms reporting unit given that this is a newer reporting unit created primarily through acquisitions. Based on the “step one”testing performed, no adjustment to the carrying value of goodwill was necessary. All of the reporting units had substantial headroom as of  June 30, 2016 No triggering events were identified during the  sixmonths ended  December 31, 2016.There has been no impairment of goodwill since the adoption of Financial Accounting Standards Board (“FASB”) ASC 350guidance for goodwill and other intangibles on  July 1, 2002 . Other Assets: Other Assets consist of (in thousands): 
 At   December 31, 2016,the Company had $42.7million of other assets compared to $1.9million as of  June 30, 2016.The increase from  June 30is due to a $40 .0million investment in Astute Medical, Inc . during the  secondquarter of fiscal year 2017.This investment is accounted for under the cost-method as we own less than 20%of the outstanding stock and we concluded that we do not have significant influence. Under the cost-method, the fair value is not estimated if there are no identified events or changes in circumstances that  mayhave a significant adverse effect on the fair value of the investment. No such events or changes in circumstances were identified in the period ended  December 31, 2016. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||