Annual report pursuant to Section 13 and 15(d)

Description of business and summary of significant accounting policies - Additional Information (Detail)

v2.4.0.6
Description of business and summary of significant accounting policies - Additional Information (Detail) (USD $)
 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2010
Significant Accounting Policies [Line Items]      
Advertising expenses (including production and communication costs) $ 3,400,000 $ 2,900,000 $ 3,000,000
Available-for-sale investments, maturities start 3 months    
Available-for-sale investments, maturities end 3 years    
Goodwill 85,682,000 86,633,000 25,068,000
Equipment
      
Significant Accounting Policies [Line Items]      
Property, plant and equipment useful life 5 years    
Building, Building Improvements and Leasehold Improvements | Minimum
      
Significant Accounting Policies [Line Items]      
Property, plant and equipment useful life 5 years    
Building, Building Improvements and Leasehold Improvements | Maximum
      
Significant Accounting Policies [Line Items]      
Property, plant and equipment useful life 40 years    
Proteins and Antibodies
      
Significant Accounting Policies [Line Items]      
Manufacturing costs for proteins and antibodies $ 13,300,000 $ 13,700,000 $ 12,300,000