Annual report pursuant to Section 13 and 15(d)

STOCKHOLDERS??? EQUITY (Details)

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STOCKHOLDERS’ EQUITY (Details)
$ / shares in Units, $ in Thousands, shares in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2021
USD ($)
Aug. 06, 2021
USD ($)
$ / shares
shares
Mar. 31, 2018
shares
Mar. 31, 2021
USD ($)
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Apr. 29, 2020
USD ($)
$ / shares
shares
Class of Stock [Line Items]                
Proceeds from warrant exercise         $ 8,177 $ 1,000 $ 0  
Conversion ratio         1      
2020 Unsecured Note | Senior Notes                
Class of Stock [Line Items]                
Number of shares for purchase under warrant (in shares) | shares               20.0
Common stock purchase price (in dollars per share) | $ / shares               $ 1.542
Fair value of warrant               $ 16,100
2019 Term Loan | Loans Payable                
Class of Stock [Line Items]                
Number of shares for purchase under warrant (in shares) | shares       6.0        
Fair value of warrant         $ 6,300      
Proceeds from warrant exercise       $ 8,200        
Convertible preferred stock                
Class of Stock [Line Items]                
Sale of stock, number of shares issued in transaction (in shares) | shares     6.1          
At-the-Market Equity Offering Programs                
Class of Stock [Line Items]                
Sale of stock, number of shares issued in transaction (in shares) | shares         95.9      
Proceeds from sale of common stock, net of fees and commissions         $ 292,000      
Remaining availability of aggregate gross sales proceeds from financing programs         $ 432,800      
Equity Offering In Aug 2021 | Common Stock                
Class of Stock [Line Items]                
Sale of stock, number of shares issued in transaction (in shares) | shares   35.0            
Proceeds from sale of common stock, net of fees and commissions   $ 100,800            
Sale of stock, offering price (in USD per share) | $ / shares   $ 3.00            
Option to purchase additional shares (in shares)   $ 5,300            
Option to purchase additional shares, period   30 days            
Over-allotment option | Common Stock                
Class of Stock [Line Items]                
Proceeds from sale of common stock, net of fees and commissions $ 15,100