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Operating Leases - Future Minimum Lease Payments under Operating Leases (Detail)
Sep. 30, 2015
USD ($)
Leases [Abstract]  
Remainder of 2015 $ 174,000
2016 696,000
2017 696,000
2018 632,000
2019 596,000
Thereafter 2,965,000
Total future lease payments due $ 5,759,000