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Stockholders' Equity and Convertible Preferred Stock (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Mar. 19, 2018
Jul. 18, 2017
Dec. 31, 2018
Dec. 31, 2017
Common stock, par value (in dollars per share)     $ 0.0001 $ 0.0001
Net proceeds from shares     $ 2,700 $ 2,095
IPO [Member]        
Number of shares issued 2,222,222      
Shares issued price per share (in dollars per share) $ 1.35      
Net proceeds from issuance of stock $ 3,000      
Underwriting Agreement [Member] | Laidlaw & Company (UK) Ltd. [Member]        
Common stock, par value (in dollars per share)   $ 0.0001    
Shares issued price per share (in dollars per share)   $ 2.00    
Underwriting Agreement [Member] | Laidlaw & Company (UK) Ltd. [Member]        
Number of shares issued   1,250,000    
Gross proceeds from shares   $ 2,500    
Net proceeds from shares   $ 2,100