Annual report pursuant to Section 13 and 15(d)

Historical Basic and Diluted Net Loss Per Share - Schedule of Anti-dilutive Securities Excluded From Computation of Earnings Per Share (Details)

v3.19.1
Historical Basic and Diluted Net Loss Per Share - Schedule of Anti-dilutive Securities Excluded From Computation of Earnings Per Share (Details) - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Antidilutive securities excluded from earning per share 16,794,000 15,205,000
Options [Member]    
Antidilutive securities excluded from earning per share 2,831,000 1,511,000
Stock-Settled Stock Appreciation Rights (SARs) [Member]    
Antidilutive securities excluded from earning per share 59,000 84,000
Restricted Stock Units (RSUs) [Member]    
Antidilutive securities excluded from earning per share 362,000 68,000
Warrants [Member]    
Antidilutive securities excluded from earning per share 13,542,000 13,542,000