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Principal and Interest Payments on Debt (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Debt Instrument [Line Items]  
2013 (remaining three months) $ 40
2014 3,740 [1]
2015   
2016   
2017   
[1] Included outstanding revolving line of credit balance based on the Company's obligation to repay the outstanding revolving line of credit balance at the end of the revolving line of credit term.