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CONVERTIBLE PREFERRED STOCK - Dividends and Liquidation Rights (Details) - USD ($)
 3 Months Ended 6 Months Ended
Dec. 04, 2019
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2022
Jul. 31, 2021
Jan. 31, 2022
Subsidiary, Sale of Stock [Line Items]            
Holders of preferred stock voting rights, as percentage of voting power of common stock outstanding 19.90%          
Preferred stock dividend payments   $ 10,400,000   $ 20,800,000 $ 12,856,000  
Accrued dividends on preferred stock   0   0   $ 10,400,000
Preferred stock dividends, unpaid and undeclared   1,700,000   1,700,000    
Dividends on preferred stock   5,200,000 $ 5,200,000 10,400,000 $ 8,522,000  
Preferred Stock            
Subsidiary, Sale of Stock [Line Items]            
Preferred stock, liquidation preference (in dollars per share) $ 1,000          
Preferred stock, dividend payment terms, period 48 months          
Preferred stock dividends, unpaid and undeclared   $ 900,000   $ 900,000    
Preferred Stock | Minimum            
Subsidiary, Sale of Stock [Line Items]            
Preferred stock, dividend rate, increase percentage each year 1.00%          
Preferred Stock | Maximum            
Subsidiary, Sale of Stock [Line Items]            
Preferred stock, dividend rate, increase percentage each year 10.00%          
Preferred Stock | Dividend for the first 48-month anniversary of closing date            
Subsidiary, Sale of Stock [Line Items]            
Preferred stock, dividend rate 5.20%          
Preferred Stock | Dividend after the first 48-month anniversary of closing date            
Subsidiary, Sale of Stock [Line Items]            
Preferred stock, dividend rate 4.00%          
Preferred Stock | Dividend increase term in the event            
Subsidiary, Sale of Stock [Line Items]            
Preferred stock, dividend rate 6.00%