Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details)

v3.19.1
Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share 18,764,000 16,102,000
Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share 3,936,000 2,256,000
Stock-Settled Stock Appreciation Rights (SARs) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share 25,000 84,000
Restricted Stock Units (RSUs) [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share 607,000 220,000
Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share 14,196,000 13,542,000