BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Redeemable Preferred Stock (Details) - Series A Preferred Stock		12 Months Ended
	Apr. 22, 2016	Dec. 31, 2018
Class of Stock [Line Items]
Preferred stock, percentage of stated value		100.00%
Preferred stock redemption, trading days prior to redemption	20 days	20 days