XML 29 R31.htm IDEA: XBRL DOCUMENT v2.4.0.8
Basic and Diluted Net Loss Per Share of Common Stock (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Numerator:        
Net loss $ (5,380) $ (5,326) $ (12,632) $ (21,295)
Denominator:        
Weighted average shares of common stock outstanding, basic 31,332,993 28,226,743 29,363,162 28,226,743
Stock options and restricted stock units related to the issuance of common stock            
Weighted average shares of common stock outstanding, diluted 31,332,993 28,226,743 29,363,162 28,226,743
Net loss per share:        
Basic $ (0.17) $ (0.19) $ (0.43) $ (0.75)
Diluted $ (0.17) $ (0.19) $ (0.43) $ (0.75)
Anti-dilutive securities excluded from calculations of diluted net loss per share:        
Stock options and restricted stock units 3,801,651 5,150,778 4,556,838 5,184,757