Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details)

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Summary of Significant Accounting Policies (Details) - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Summary of Significant Accounting Policies [Abstract]        
Net loss $ (4,368,000) $ (2,435,000) $ (8,407,000) $ (8,896,000)
Weighted average number of common shares outstanding:        
Basic and diluted 4,167,806 4,063,660 4,121,045 4,026,726
Net loss attributable to common stockholders per share:        
Basic and diluted $ (1.05) $ (0.60) $ (2.04) $ (2.21)