Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Common Share - Calculation of Basic and Diluted Net Loss Per Share (Detail)

v2.4.0.8
Net Loss Per Common Share - Calculation of Basic and Diluted Net Loss Per Share (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Numerator:        
Net loss attributed to common stockholders $ (4,711) $ (10,670) $ (12,081) $ (19,528)
Denominator:        
Weighted-average common shares outstanding—denominator for basic and diluted net loss per share 36,005,294 28,095,522 35,953,234 26,646,993
Basic and diluted net loss per common share attributed to common stockholders $ (0.13) $ (0.38) $ (0.34) $ (0.73)