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Fair Value Measurement (Tables)
3 Months Ended
Mar. 31, 2018
Fair Value Measurement [Abstract]  
Schedule of fair value measurement warrants
          Quote Prices In Active Markets     Significant Other Observable Inputs     Significant Other Unobservable Inputs  
Description   Fair Value     (Level 1)     (Level 2)     (Level 3)  
Warrant liabilities at December 31, 2017   $ 858       -       -     $ 858  
Warrant liabilities at March 31, 2018   $ 661       -       -     $ 661  
                                  
The change in level 3 fair value is as follows:                                
                                 
Warrant liability as of December 31, 2017                           $ 858  
New warrant liabilities                                       -  
Decrease in fair value of warrant liability                                      197  
Ending warrant liability as of March 31, 2018                           $ 661