Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share (Details)

v3.10.0.1
Net Loss Per Share (Details) - shares
shares in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Antidilutive securities excluded from the computation of diluted net loss per share        
Total 22,019 22,145 21,925 22,082
Employee stock option        
Antidilutive securities excluded from the computation of diluted net loss per share        
Total 21,762 21,958 21,762 21,958
Purchase Plan        
Antidilutive securities excluded from the computation of diluted net loss per share        
Total 257 187 163 124