Net Loss Per Share - Schedule of Anti-Dilutive Securities Excluded From Computation of Diluted Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Anti-dilutive common shares excluded from the computation of diluted earnings per share	44,687,540	79,410,284
Options to Purchase Common Stock [Member]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	1,165,086	413,301
Series A Convertible Preferred Stock and Accumulated Dividends [Member]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	41,743,654	39,537,501
Restricted Stock Units [Member]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	647,649	680,363
Warrant [Member]
Anti-dilutive common shares excluded from the computation of diluted earnings per share	1,131,151	38,779,119