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LONG-TERM DEBT - Mandatorily Redeemable Preferred Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
May 01, 2019
Debt Instrument [Line Items]      
Preferred stock, shares issued 0 0  
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001  
Preferred stock issued $ 0 $ 0  
Redeemable Preferred Stock      
Debt Instrument [Line Items]      
Preferred stock, shares issued     60,000
Preferred stock, par value (in dollars per share)     $ 0.001
Liquidation preference value 60,000   $ 60,000
Preferred stock issued     $ 60,000
Interest expense paid on dividends $ 1,800