Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share	16,077,000	16,915,000	16,077,000	16,915,000
Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share	2,256,000	1,496,000	2,256,000	1,496,000
Stock-Settled Stock Appreciation Rights (SARs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share	59,000	84,000	59,000	84,000
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share	220,000	68,000	220,000	68,000
Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share	13,542,000	15,267,000	13,542,000	15,267,000