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Aggregate Minimum Operating Lease Payments under New Operating Leases Entered (Detail) (New Operating Leases Entered in 2012, USD $)
Sep. 30, 2012
New Operating Leases Entered in 2012
 
Operating Leases  
Remainder of 2012 $ 102
2013 344
2014 351
2015 419
2016 449
Thereafter 621
Total minimum lease payments $ 2,286