COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Other Commitments [Line Items]
Purchase obligation	$ 1,800
Required capital contribution	357	$ 360
Corporate Joint Venture
Other Commitments [Line Items]
Remaining payments to acquire interest in joint venture	$ 203