Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Schedule of Antidilutive Securities (Details)

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Summary of Significant Accounting Policies - Schedule of Antidilutive Securities (Details) - shares
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive earnings per share, amount 48,711,000 48,959,000
Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive earnings per share, amount 16,625,000 12,133,000
Convertible Preferred Stock and Accrued Dividends Upon Conversion [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive earnings per share, amount 26,287,000 30,628,000
Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive earnings per share, amount 5,799,000 6,198,000