Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share (Details Textuals)

v3.19.2
Net Income (Loss) Per Share (Details Textuals) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Earnings Per Share [Abstract]        
Common stock equivalents excluded from the calculation of diluted net income (loss) (shares) 2.5 3.6 2.7 3.7