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Shareholders' Equity (Details Narrative) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended
Jan. 30, 2018
Dec. 31, 2016
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Proceeds from issuance of common stock     $ 877 [1]  
Number of share issued       640,163  
Shares issued price per share       $ 1.46  
Net proceeds from offering       $ 935  
Warrant exercise price     $ 1.13 $ 2.05 $ 1.13
Fair value of warrants     $ 8 $ 270 [2]  
Warrant liability     417   $ 425
Stock-based compensation expense     13 $ 13 [1],[2]  
Unrecognized share based compensation     $ 32    
Common Stock [Member]          
Number of share issued       640,163  
Market Offering [Member]          
Offering expenses       $ 59  
Registered Direct Offering [Member]          
Number of share issued   1,000,000      
Shares issued price per share   $ 1.50      
Proceeds from warrants   $ 1,320      
Registered Direct Offering [Member] | Warrant [Member]          
Warrants to purchase common stock   1,000,000      
Warrant exercise price   $ 2.05      
Warrant term   5 years      
Fair value of warrants   $ 1,240      
Registered Direct Offering [Member] | Common Stock [Member]          
Fair value of warrants   $ 80      
Common Stock Sales Agreement [Member]          
Proceeds from issuance of common stock $ 2,500        
[1] The condensed consolidated statement of cash flows for the three months ended March 31, 2018 was restated to include the loss due to the change in the fair value of marketable equity securities of $78 thousand in net loss. The amount was originally included in other comprehensive loss.
[2] The condensed consolidated statement of operations for the three months ended March 31, 2018 was restated to include the loss on marketable equity securities in non-operating income rather than other comprehensive income as originally reported.