Annual report pursuant to Section 13 and 15(d)

Net Loss per Share - Narrative (Details)

v3.19.1
Net Loss per Share - Narrative (Details) - shares
shares in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Earnings Per Share [Abstract]    
Anti-dilutive stock excluded from calculation of weighted average shares outstanding (shares) 14.7 15.9