Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited) (Parenthetical)

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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (unaudited) (Parenthetical) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2018
Mar. 31, 2018
Transactional expenses $ 1      
Stock Issuance March 2018 [Member]        
Price per share       $ 32.10
Transactional expenses       $ 45
Stock Issuance April 2018 [Member]        
Price per share     $ 32.10  
Stock Issuance June 2018 [Member]        
Transactional expenses     $ 50  
Stock Issuance March 2019 [Member]        
Warrants exercise price (in dollars per share)   $ 3.50