| 
           Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $) 
        In Thousands, unless otherwise specified  | 
        12 Months Ended | 0 Months Ended | |||
|---|---|---|---|---|---|
| 
           Jun. 30, 2014 
         | 
        
           Jun. 30, 2013 
         | 
        
           Jun. 30, 2012 
         | 
        
           Jul. 22, 2013
 
          Bionostics Holdings, Ltd 
         | 
        
           Apr. 30, 2014
 
          PrimeGene 
         | 
      |
| Business Acquisition [Line Items] | |||||
| Current assets | $ 9,605 | $ 1,272 | |||
| Intangible Assets | 60,500 | 14,622 | |||
| Goodwill | 151,473 | 84,336 | 85,682 | 56,349 | 5,518 | 
| Equipment | 2,180 | 546 | |||
| Total assets acquired | 128,634 | 21,958 | |||
| Liabilities | 3,007 | 887 | |||
| Deferred income taxes | 22,478 | 2,310 | |||
| Net assets acquired | 103,149 | 18,761 | |||
| Cash paid, net of cash acquired | 109,180 | 0 | 0 | 103,149 | 6,031 | 
| Note payable | 0 | 12,730 | |||
| Net purchase price | $ 103,149 | $ 18,761 | |||
| X | ||||||||||
| 
             
- Details 
          
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of assets acquired at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of tangible personal property used to produce goods and services, including, but is not limited to, tools, dies and molds, computer and office equipment, acquired at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of intangible assets, excluding goodwill, acquired at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount of liabilities assumed at the acquisition date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  | 
        
| 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://www.xbrl.org/2003/role/presentationRef 
  | 
        
| X | ||||||||||
| 
             
- Definition 
          The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
  |