REVENUE (Tables)

12 Months Ended

Dec. 31, 2019

Revenue [abstract]

Components of revenue

Revenue includes the following components:

	For the Years Ended December 31,
	2019			2018
Revenue - Streaming Agreement
Cash payment proceeds	$	6,027		$	6,036
Deferred revenue recognized	13,334			13,738
Variable consideration adjustment	(9,262		)	—
	10,099			19,774
Revenue - Spot sales	254,638			253,243
Total revenue	$	264,737		$	273,017