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Merger with Macrocure and Related Transactions - Merger with Macrocure Ltd. (Details)
$ / shares in Units, $ in Thousands
12 Months Ended
Jan. 23, 2017
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
Merger with Macrocure    
Value of net assets acquired in connection with merger with Macrocure, excluding cash   $ 96
Compensation cost related to Macrocure equity awards, not yet recognized   6,834
Macrocure | Common Stock    
Merger with Macrocure    
Common stock shares issued | shares 3,256,898  
Percentage of outstanding ordinary shares acquired 100.00%  
Approximate number of the Company's shares issued for each share of Macrocure's ordinary shares 0.1815  
Common share value (in dollars per share) | $ / shares $ 9.90  
Final net cash calculation at closing $ 21,875  
Value of net assets acquired in connection with merger with Macrocure, excluding cash $ 96  
Compensation cost related to Macrocure equity awards, not yet recognized   280
One-time charge with the extension of the exercise periods   $ 504