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
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Stock Issuance March 2018 [Member]            
Price per share           $ 321.00
Transactional expenses           $ 45
Stock Issuance April 2018 [Member]            
Price per share         $ 321.00  
Stock Issuance June 2018 [Member]            
Transactional expenses       $ 77 $ 50  
Stock Issuance March 2019 [Member]            
Warrants exercise price (in dollars per share)     $ 35.00      
At-the-market offering [Member]            
Transactional expenses   $ 1        
July 2019 Financing [Member]            
Transactional expenses $ 484