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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash and Cash Equivalents (Details)
12 Months Ended
Dec. 31, 2019
Minimum  
Cash and Cash Equivalents [Line Items]  
Cash and cash equivalents, maturity term (in hours) 24 hours
Maximum  
Cash and Cash Equivalents [Line Items]  
Cash and cash equivalents, maturity term (in hours) 72 hours