REVENUE (Tables)

12 Months Ended

Dec. 31, 2017

Revenue [abstract]

Components of revenue

Revenue includes the following components:

	For the Years Ended   December 31,
	2017		2016
Revenue - Streaming Agreement
Cash payment proceeds	$	6,138	$	4,385
Deferred revenue recognized	14,156		11,267
	20,294		15,652
Revenue - Spot sales	295,203		205,638
Total revenue	$	315,497	$	221,290