Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details 1)

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Stockholders' Equity (Details 1) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Class of Stock [Line Items]    
Gross Proceeds $ 1,444 $ 1,927
Common Stock [Member]    
Class of Stock [Line Items]    
Gross Proceeds  
Common Stock [Member] | April 29, 2018 [Member]    
Class of Stock [Line Items]    
Shares [1] 806,452  
Gross Proceeds $ 1,000  
Common Stock [Member] | April 4 - April 23, 2018 [Member]    
Class of Stock [Line Items]    
Shares [2] 131,225  
Gross Proceeds $ 176  
Common Stock [Member] | January 19, 2018 [Member]    
Class of Stock [Line Items]    
Shares [3] 140,295  
Gross Proceeds $ 296  
Common Stock [Member] | February 8, 2017 [Member]    
Class of Stock [Line Items]    
Shares [4] 500,000  
Gross Proceeds $ 2,125  
[1] Shares issued pursuant to a private placement with accredited investors for $1.24 per share.
[2] Shares of common stock sold for between $1.25 and $1.38 per share in an at-the-market offering.
[3] Shares of common stock sold for $2.111 per share in an at-the-market offering.
[4] Shares issued pursuant to a registered direct offering with an institutional investor for $4.25 per share.