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REPORTABLE SEGMENT AND RELATED INFORMATION - Additional Information (Details) - segment
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Number of reportable segments 2   1
Customer concentration risk | Consolidated revenues | State of Colorado      
Segment Reporting Information [Line Items]      
Concentration risk percentage   10.00%