Quarterly report pursuant to sections 13 or 15(d)

Debt - Summary of Future Principal Amounts Payable (Detail)

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Debt - Summary of Future Principal Amounts Payable (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Debt Instrument [Line Items]  
Future principal amounts payable, 2013 (remainder of) $ 1,340
Future principal amounts payable, 2014 2,619
Future principal amounts payable, 2015 2,314
Future principal amounts payable, 2016 1,751
Future principal amounts payable, 2017 1,466
Future principal amounts payable, Total $ 9,490