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Sale of Buildings - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
0 Months Ended 9 Months Ended
Feb. 28, 2013
Sep. 30, 2013
Dec. 31, 2012
Leases [Abstract]      
Proceeds from sale of manufacturing facility $ 3,496    
Loss on sale of building net of commissions and fees   31  
Accrued in accounts payable and accrued expenses   $ 1,035 $ 1,243