REVENUE (Tables)

12 Months Ended

Dec. 31, 2018

Revenue [abstract]

Components of revenue

Revenue includes the following components:

	For the Years Ended December 31,
	2018		2017
Revenue - Streaming Agreement
Cash payment proceeds	$	6,036	$	6,138
Deferred revenue recognized	13,738		14,156
	19,774		20,294
Revenue - Spot sales	253,243		295,203
Total revenue	$	273,017	$	315,497