Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share (Details Textuals)

v3.10.0.1
Net Income (Loss) Per Share (Details Textuals) - shares
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Earnings Per Share [Abstract]        
Common stock equivalents excluded from the calculation of diluted net income (loss) (shares) 3.8 4.5 3.7 1.1