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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
Mar. 31, 2013
Dec. 31, 2012
Extinguishment of Debt [Line Items]    
Long Term debt $ 39,878 $ 36,196
Short-term 10,070 16,247
Total indebtedness 49,948 52,443
Term Loan
    
Extinguishment of Debt [Line Items]    
Long Term debt 39,700 36,000
Short-term 10,000 10,000
Total indebtedness 49,700 46,000
Notes payable on product acquisitions and asset purchase
    
Extinguishment of Debt [Line Items]    
Long Term debt 178 196
Short-term 70 6,247
Total indebtedness $ 248 $ 6,443