Quarterly report pursuant to Section 13 or 15(d)

Common Stock and Net Loss Per Share (Details Textual)

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Common Stock and Net Loss Per Share (Details Textual) - USD ($)
9 Months Ended
Mar. 03, 2017
Sep. 30, 2018
Sep. 30, 2017
Proceeds from Issuance of Common Stock   $ 0 $ 13,657,331
Class of Warrant or Right, Number of Securities Called by Warrants or Rights 5,929,256    
Weighted Average Number of Shares Outstanding, Diluted   9,249,626 9,005,714
Private Placement [Member]      
Proceeds from Issuance of Common Stock $ 13,700,000    
Sale of Stock, Price Per Share $ 2.535    
Proceeds from Issuance or Sale of Equity $ 15,000,000    
Payments of Stock Issuance Costs $ 1,100,000    
Common Stock [Member] | Private Placement [Member]      
Sale of Stock, Number of Shares Issued in Transaction 5,220,826    
Preferred Stock [Member] | Private Placement [Member]      
Sale of Stock, Number of Shares Issued in Transaction 708,430