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Related Parties (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Related Party Transaction [Abstract]      
Sale of common stock, net of offering costs   $ 14,664  
Relative of Former Board Member [Member]      
Related Party Transaction [Abstract]      
Related party expense     $ 13
Broadfin Capital and Sabby Management Stock Purchase Agreements [Member] | Broadfin Capital [Member]      
Related Party Transaction [Abstract]      
Sale of common stock, net of offering costs $ 1,000    
Sale of common stock, net of offering costs (in shares) 925,926    
Share price (in dollars per share) $ 1.08    
Broadfin Capital and Sabby Management Stock Purchase Agreements [Member] | Sabby Management [Member]      
Related Party Transaction [Abstract]      
Sale of common stock, net of offering costs $ 1,000    
Sale of common stock, net of offering costs (in shares) 925,926    
Share price (in dollars per share) $ 1.08    
Subscription Agreement [Member] | Dr. Dolev Rafaeli [Member]      
Related Party Transaction [Abstract]      
Sale of common stock, net of offering costs $ 1,000    
Sale of common stock, net of offering costs (in shares) 925,926    
Share price (in dollars per share) $ 1.08