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STARBOARD INVESTMENT - Series A and B Warrants (Details) - USD ($)
$ / shares in Units, $ in Millions
6 Months Ended
Feb. 25, 2022
Nov. 18, 2019
Jun. 30, 2022
Dec. 31, 2021
Jun. 04, 2020
Feb. 25, 2020
Series B warrants            
Class of Warrant or Right [Line Items]            
Warrants and rights outstanding     $ 96.8 $ 96.4    
Starboard | Series A warrants            
Class of Warrant or Right [Line Items]            
Conversion price   $ 3.65        
Warrants and rights outstanding, term     8 years      
Warrants and rights outstanding   $ 4.8 $ 12.8 $ 11.3    
Warrants exercised     0      
Number of shares purchased by warrant   5,000,000        
Starboard | Series B warrants            
Class of Warrant or Right [Line Items]            
Conversion price         $ 3.65  
Warrants exercised     0      
Number of shares purchased by warrant           100,000,000
Proceeds from issuance of preferred stock and preference stock $ 4.6          
Class of warrant or right, warrants subject to adjustments         31,506,849  
Class of warrant or right, outstanding (in shares)         68,493,151  
Starboard | Maximum | Series A warrants            
Class of Warrant or Right [Line Items]            
Warrants issued, shares   5,000,000        
Starboard | Maximum | Series B warrants            
Class of Warrant or Right [Line Items]            
Conversion price           $ 5.25
Starboard | Minimum | Series B warrants            
Class of Warrant or Right [Line Items]            
Conversion price           $ 3.65