MEZZANINE EQUITY (Details) $ / shares in Units, $ in Thousands						3 Months Ended		12 Months Ended
	Feb. 13, 2019 USD ($) shares	Jan. 02, 2019 USD ($) shares	Nov. 09, 2018 USD ($) shares	Nov. 08, 2018 USD ($) tranche	Feb. 13, 2018 USD ($) $ / shares shares	Mar. 31, 2020 USD ($) $ / shares shares	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($) $ / shares shares
Temporary Equity [Line Items]
Preferred stock, shares authorized (in shares) | shares						60,000,000.0
Preferred Stock, par value (in dollars per share) | $ / shares						$ 0.001
Loss on forward contracts for the issuance of convertible preferred stock | $						$ 0	$ 16,787
Accumulated and unpaid dividends | $						$ 25,000		$ 19,800
Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Preferred Stock, par value (in dollars per share) | $ / shares						$ 1,000		$ 1,000
Convertible preferred stock, shares issued (in shares) | shares						299,950		299,950
Convertible preferred stock stated value | $						$ 300,000		$ 300,000
Series A Preferred Stock
Temporary Equity [Line Items]
Preferred Stock, par value (in dollars per share) | $ / shares						$ 1,000
Dividend rate						6.50%
SPA Amendment, Private Placement | Redeemable Convertible Preferred Stock
Temporary Equity [Line Items]
Convertible preferred stock issued (in shares) | shares					299,950
Price per share (in dollars per share) | $ / shares					$ 1,000
Consideration received | $				$ 300,000	$ 300,000
Number of tranches | tranche				3
Shares converted (in shares) | shares					56,100,000
Initial conversion price (in dollars per share) | $ / shares					$ 5.35
SPA Amendment, Initial Issuance
Temporary Equity [Line Items]
Convertible preferred stock issued (in shares) | shares			100,000
Consideration received | $			$ 100,000
SPA Amendment, First Subsequent Issuance
Temporary Equity [Line Items]
Convertible preferred stock issued (in shares) | shares		50,000
Consideration received | $		$ 50,000
SPA Amendment, Second Subsequent Issuance
Temporary Equity [Line Items]
Convertible preferred stock issued (in shares) | shares	149,950
Consideration received | $	$ 150,000