Annual report pursuant to Section 13 and 15(d)

Acquisitions - Additional Information (Detail)

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Acquisitions - Additional Information (Detail) (USD $)
 12 Months Ended
Jun. 30, 2011
Boston Biochem
  
Acquired intangible assets $ 4,300,000
Business acquisition, transaction costs 148,000
Boston Biochem | Developed technology
  
Acquired intangible assets 1,900,000
Acquired intangible assets, useful life (in years) 12
Boston Biochem | Trade names
  
Acquired intangible assets 1,700,000
Acquired intangible assets, useful life (in years) 12
Boston Biochem | Non-compete agreement
  
Acquired intangible assets 400,000
Acquired intangible assets, useful life (in years) 5
Boston Biochem | Customer relationships
  
Acquired intangible assets 300,000
Acquired intangible assets, useful life (in years) 12
Tocris
  
Acquired intangible assets 48,425,000
Business acquisition, transaction costs 1,600,000
Tocris | Developed technology
  
Acquired intangible assets 25,300,000
Acquired intangible assets, useful life (in years) 15
Tocris | Trade names
  
Acquired intangible assets 16,500,000
Acquired intangible assets, useful life (in years) 10
Tocris | Customer relationships
  
Acquired intangible assets $ 6,600,000
Acquired intangible assets, useful life (in years) 13
Non-compete agreement
  
Acquired intangible assets, useful life (in years) 5