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Redeemable Convertible Preferred Stock - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Class Of Stock [Line Items]    
Securities purchase agreement date Apr. 13, 2012  
Common stock, shares issued 8,008,759 8,008,759
Completion date of issuance of series A convertible preferred stock May 02, 2012  
Redemption Date of Series A Preferred Stock Apr. 30, 2017  
Warrants Value $ 840,000  
Accretion amount 42 34
Consideration for the issuance of preferred stock and warrants 5,000,000  
Exercise Price of $6.00
    
Class Of Stock [Line Items]    
Conversion price per share $ 6.00  
Exercise Price of $7.00
    
Class Of Stock [Line Items]    
Conversion price per share $ 7.00  
Series A Convertible Preferred Stock
    
Class Of Stock [Line Items]    
Sale of series A convertible preferred stock, Number 1,000,000  
Conversion price per share $ 5.00  
Preferred stock authorized 1,000,000  
Cumulative dividends at a rate 6.00%  
Liquidation preference per share $ 5.00  
Number of Installments 36  
Annual interest rate on redemption value payable 6.00%  
Preferred stock Value $ 4,160,000  
Common Stock Purchase Warrants Exercisable
    
Class Of Stock [Line Items]    
Common stock purchase warrants exercisable 325,000  
Common Stock Purchase Warrants Exercisable | Exercise Price of $6.00
    
Class Of Stock [Line Items]    
Common stock purchase warrants exercisable 125,000  
Common Stock Purchase Warrants Exercisable | Exercise Price of $7.00
    
Class Of Stock [Line Items]    
Common stock purchase warrants exercisable 200,000  
Convertible Common Stock
    
Class Of Stock [Line Items]    
Common stock, shares issued 1,000,000