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Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2017
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 liability at December 31, 2016   $ 3,316       -       -     $ 3,316  
Reclassification of warrants from liabilities to equity per ASU 2017-11   $ (2,611 )     -       -     $ (2,611 )
Revised warrant liability at December 31, 2016   $ 705       -       -     $ 705  
Warrant liability at December 31, 2017   $ 858       -       -     $ 858  
Schedule of change in level 3 fair value
Warrant liability December 31, 2016 $705 
New warrant liabilities  - 
Increase in fair value of warrant liability  153 
Ending warrant liability as of December 31, 2017 $858