Annual report pursuant to Section 13 and 15(d)

Intangible Assets and Goodwill - Additional Information (Detail)

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Intangible Assets and Goodwill - Additional Information (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Intangible Assets Gross Excluding Goodwill [Line Items]      
Amortization expense $ 117,000 $ 136,000 $ 130,000
Estimated intangible asset amortization expense 2014 69,000    
Estimated intangible asset amortization expense 2015 62,000    
Estimated intangible asset amortization expense 2016 52,000    
Non cash investment   200,000  
Former Distributor In India
     
Intangible Assets Gross Excluding Goodwill [Line Items]      
Amortization expense 55,000 5,000  
Acquired intangible assets   224,000  
Amortization of Intangible Assets (non-compete agreement and customer and luminary lists, etc.) 4 years    
Non cash investment   $ 200,000