Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share - Reconciliation of Numerator and Denominator (Detail)

v3.5.0.2
Net Loss Per Share - Reconciliation of Numerator and Denominator (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Numerator:        
Net loss $ (6,864) $ (8,306) $ (14,716) $ (19,460)
Less: noncash income from change in fair value of common stock warrants   (308)    
Net loss - diluted $ (6,864) $ (8,614) $ (14,716) $ (19,460)
Denominator:        
Weighted average common shares outstanding - basic 71,511 71,334 71,500 69,046
Dilutive effect of warrants   1,481    
Weighted-average common shares outstanding and dilutive potential common shares — diluted 71,511 72,815 71,500 69,046
Net loss per share        
Basic $ (0.10) $ (0.12) $ (0.21) $ (0.28)
Diluted $ (0.10) $ (0.12) $ (0.21) $ (0.28)