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Loss Per Common Share (Details Textual) - shares	3 Months Ended
Loss Per Common Share (Details Textual) - shares	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)	1,561,856	1,445,921
Incremental common shares attributable to dilutive effect of share-based payment arrangements (shares)		1,263,635
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Incremental common shares attributable to dilutive effect of share-based payment arrangements (shares)		898,635
Contingent Restricted Stock Units (RSUs)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share (shares)	1,343,781
Series 4 Convertible Preferred Stock \| Convertible Preferred Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares outstanding (shares)	95,000		95,000
Convertible preferred stock, shares issued upon conversion (shares)	10,337,949	9,550,667