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 3 Months Ended
Jul. 27, 2010
Mar. 31, 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  
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%  
Stock warrants [Member] | Re-measuring [Member]
   
Stockholders Equity Note [Line Items]    
Percentage of weighted average expected stock volatility for warrant   25.49%
Contract term of expected life assumption   1 year 3 months 18 days
Percentage of risk free rate for warrants   0.39%
Dividend yield   1.19%