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Quarterly Results of Operations (Unaudited) - Additional Information (Detail) (USD $)
 3 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2006
Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]        
Income tax valuation allowance against certain deferred tax assets $ 10,132,000 $ 1,489,000    
Impairment of goodwill   2,012,000   2,012,000
Gain (loss) from the litigation-related settlements   1,975,000 (37,200,000) 1,975,000
Increase in inventory reserves   $ 1,400,000   $ 1,400,000