Annual report pursuant to Section 13 and 15(d)

Improvements and Equipment, net (Details Textual)

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Improvements and Equipment, net (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Depreciation, Depletion and Amortization, Total $ 706,000 $ 1,800,000