v3.2.0.727
Net loss per share attributable to common stockholders (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Numerator:        
Net loss attributable to common stockholders, basic and diluted $ (5,937) $ (3,734) $ (13,819) $ (9,182)
Denominator:        
Weighted average common stock, basic and diluted (in shares) 36,724 35,621 36,558 35,486
Net loss per share attributable to common stockholders:        
Basic and diluted (in dollars per share) $ (0.16) $ (0.10) $ (0.38) $ (0.26)