Note 3 - Selected Balance Sheet Data - Changes in Carrying Amount of Goodwill (Details) $ in Thousands  | 
3 Months Ended | 
|---|---|
| 
 Sep. 30, 2019  
USD ($) 
 | |
| Balance | $ 732,667 | 
| Acquisitions (Note 4) | 0 | 
| Currency translation | (2,255) | 
| Balance | 730,412 | 
| Protein Sciences [Member] | |
| Balance | 377,407 | 
| Acquisitions (Note 4) | 0 | 
| Currency translation | (2,150) | 
| Balance | 375,257 | 
| Diagnostics and Genomics [Member] | |
| Balance | 355,260 | 
| Acquisitions (Note 4) | 0 | 
| Currency translation | (105) | 
| Balance | $ 355,155 | 
| X | ||||||||||
- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  | 
| X | ||||||||||
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  | 
| X | ||||||||||
- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
  | 
| X | ||||||||||
- Details 
  | 
| X | ||||||||||
- Details 
  |