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Summary of Significant Accounting Policies - Additional information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Accounting Policies [Line Items]    
Cash and cash equivalents description 90 days or less  
Credit items after shipment and invoicing 30 days  
Financial assets or liabilities at fair value $ 0 $ 0
Other Revenue 0 279,000
Threshold percentage 50.00%  
Liability for unrecognized tax benefits $ 0 $ 0
Antidilutive securities excluded from computation of earnings per share 0 0
Minimum [Member]
    
Accounting Policies [Line Items]    
Open tax years for jurisdictions 2010  
Income tax statutes expiration year 2014  
Minimum [Member] | Leased assets [Member]
    
Accounting Policies [Line Items]    
Equipment leasehold improvements, and leased assets useful life 7 years  
Minimum [Member] | Equipment [Member]
    
Accounting Policies [Line Items]    
Equipment leasehold improvements, and leased assets useful life 3 years  
Minimum [Member] | Leasehold improvements [Member]
    
Accounting Policies [Line Items]    
Equipment leasehold improvements, and leased assets useful life 3 years  
Maximum [Member]
    
Accounting Policies [Line Items]    
Open tax years for jurisdictions 2012  
Income tax statutes expiration year 2016  
Maximum [Member] | Leased assets [Member]
    
Accounting Policies [Line Items]    
Equipment leasehold improvements, and leased assets useful life 10 years  
Maximum [Member] | Equipment [Member]
    
Accounting Policies [Line Items]    
Equipment leasehold improvements, and leased assets useful life 20 years  
Maximum [Member] | Leasehold improvements [Member]
    
Accounting Policies [Line Items]    
Equipment leasehold improvements, and leased assets useful life 13 years