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