Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share (Details Textuals)

v3.7.0.1
Net Income (Loss) Per Share (Details Textuals) - shares
shares in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Earnings Per Share [Abstract]        
Common stock equivalents excluded from the calculation of net loss per share (shares) 1.3 1.2 0.9 0.7