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Summary of Different Loans in Place Constitute Short-Term and Long-Term Loan Balances Together (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Extinguishment of Debt [Line Items]    
Long Term debt $ 38,894 $ 36,196
Short-term 71 16,247
Total indebtedness 38,965 52,443
Term Loan
    
Extinguishment of Debt [Line Items]    
Long Term debt   36,000
Short-term   10,000
Total indebtedness   46,000
Working capital revolver
    
Extinguishment of Debt [Line Items]    
Long Term debt 38,750  
Total indebtedness 38,750  
Notes payable on product acquisitions and asset purchase
    
Extinguishment of Debt [Line Items]    
Long Term debt 144 196
Short-term 71 6,247
Total indebtedness $ 215 $ 6,443