FAIR VALUE MEASUREMENT - Narrative (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets or liabilities at fair value	$ 0	$ 0

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.

No definition available.

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Balance Type:	na
Period Type:	duration