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Summary of Significant Accounting Policies - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Details) - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Stock Options and Restricted Stock Units [Member]    
Antidilutive securities excluded from computation of earnings per share, amount 14,269,000 7,983,000
Warrants [Member]    
Antidilutive securities excluded from computation of earnings per share, amount 9,395,000
Treasury Shares [Member]    
Antidilutive securities excluded from computation of earnings per share, amount 81,000