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, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Class of Stock [Line Items]        
Warrants exercise price (in dollars per share)   $ 0.57   $ 0.57
Stock Issuance January 2021 [Member]        
Class of Stock [Line Items]        
Price per share   $ 0.80    
Transactional expenses   $ 3,096    
Stock Issuance February 2021 [Member]        
Class of Stock [Line Items]        
Price per share   $ 1.20    
Transactional expenses   $ 5,002    
Stock Issuance At Market Offering January 2021 [Member]        
Class of Stock [Line Items]        
Transactional expenses   $ 230    
Stock Issuance At Market Offering April And June 2021 [Member]        
Class of Stock [Line Items]        
Transactional expenses $ 612      
Stock issuance February 2020 [Member]        
Class of Stock [Line Items]        
Price per share       $ 1,000.00
Transactional expenses       $ 711
Stock Issuance February 2020 [Member]        
Class of Stock [Line Items]        
Warrants exercise price (in dollars per share)       $ 0.57
Transactional expenses       $ 292
Stock Issuance March 2020 [Member]        
Class of Stock [Line Items]        
Price per share       $ 1.10
Transactional expenses       $ 1,221
Stock Issuance At Market Offering May And June 2020 [Member]        
Class of Stock [Line Items]        
Transactional expenses     $ 1,131