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WARRANTS - Stock Warrants Outstanding (Details) - $ / shares
6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Class of Warrant or Right [Line Items]    
Number of underlying shares (in shares) 420,629 420,629
Weighted average exercise price (in dollars per share) $ 15.91  
Exercised (in shares) 0  
Issued April 2017    
Class of Warrant or Right [Line Items]    
Number of underlying shares (in shares) 781 781
Weighted average exercise price (in dollars per share) $ 127.95  
Remaining contractual life 2 years 9 months 29 days  
Acquired October 2020    
Class of Warrant or Right [Line Items]    
Number of underlying shares (in shares) 29,446 29,446
Weighted average exercise price (in dollars per share) $ 0.01  
Remaining contractual life 8 years 2 months 26 days  
Issued February 2020    
Class of Warrant or Right [Line Items]    
Number of underlying shares (in shares) 388,796 388,796
Weighted average exercise price (in dollars per share) $ 15.28  
Remaining contractual life 2 years 7 months 13 days  
Issued November 2017    
Class of Warrant or Right [Line Items]    
Number of underlying shares (in shares) 1,606 1,606
Weighted average exercise price (in dollars per share) $ 0.41  
Remaining contractual life 2 years 4 months 17 days  
Subtotal    
Class of Warrant or Right [Line Items]    
Number of underlying shares (in shares) 419,848 419,848
Weighted average exercise price (in dollars per share) $ 15.70