CREDIT FACILITY AND LONG-TERM DEBT CREDIT FACILITY AND LONG-TERM DEBT - Interest Expense Related to the Notes (Details) - Senior Convertible Note - Convertible Debt $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Interest expense related to contractual coupon interest	$ 925
Interest expense related to amortization of the debt discount	1,744
Total interest expense related to debt	$ 2,669

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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Represents the portion of interest incurred in the period on debt arrangements that was charged against earnings, excluding amortization of debt discount (premium) and financing costs.

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