Equity (Details Textual) - USD ($)	1 Months Ended
	Feb. 14, 2018	Jan. 17, 2018	Mar. 31, 2018	Dec. 31, 2017	Jan. 17, 2017
Schedule of Equity Method Investments [Line Items]
Long-term Debt, Gross			$ 76,886,000	$ 139,235,000
Debt Conversion, Converted Instrument, Shares Issued		189,645
Private Placement SPA [Member]
Schedule of Equity Method Investments [Line Items]
Stock Issued During Period, Shares, New Issues	945,819
Shares Issued, Price Per Share	$ 7.20
Stock Issued During Period, Value, New Issues	$ 6,800,000
Convertible Senior Unsecured Promissory Notes [Member]
Schedule of Equity Method Investments [Line Items]
Long-term Debt, Gross	$ 70,238				$ 1,600,000
Debt Instrument, Interest Rate, Stated Percentage					6.00%
Debt Conversion, Converted Instrument, Shares Issued	10,400,000	189,645