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Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)
 12 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Mar. 31, 2009
Apr. 30, 2009
Trade name [Member]
Mar. 31, 2009
Trade name [Member]
Dec. 31, 2013
Trade name [Member]
Mar. 31, 2009
In-process research and development [Member]
Dec. 31, 2013
In-process research and development [Member]
Acquired Finite-Lived Intangible Assets [Line Items]                  
Aggregate purchase price       $ 5,135,000          
Minimum expiration year of intangible assets                 2027
Impairment amount of intangible asset     655,000            
Useful life 12 years 8 months 12 days       15 years 15 years 15 years     
Amortization expense $ 269,000 $ 264,000 $ 366,000