Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

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Stockholders' Equity - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 9 Months Ended
Jul. 27, 2010
Sep. 30, 2014
Stockholders Equity Note [Line Items]    
Number of shares of common stock to be purchased by issuing warrants 250,000  
Exercise price of stock warrants $ 9.60 $ 9.60
Date from which warrants or rights exercisable   Oct. 14, 2010
Warrants expiration date   Oct. 14, 2015
Fair value of warrants outstanding $ 2.0  
Outstanding stock warrants   0
Stock warrants [Member]
   
Stockholders Equity Note [Line Items]    
Percentage of weighted average expected stock volatility for warrant 111.46%  
Contract term of expected life assumption   5 years
Percentage of risk free rate for warrants 2.07%  
Dividend yield 0.00%