Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.2.0.727
Stockholders' Equity - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Millions
Jul. 27, 2010
Dec. 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 (in usd per share) $ 9.60  
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%  
Outstanding stock warrants   0