ACQUISITIONS - Assets acquired and liabilities (Details) - USD ($) $ in Thousands	Aug. 25, 2017	Jun. 30, 2018	Dec. 31, 2017
Fair value of assets acquired and liabilities assumed:
Inventory		$ 27,299	$ 31,951
Mineral Property Interests		302,540	293,437
Property, Plant and Equipment		74,187	51,046
TOTAL ASSETS		585,010	592,129
Short term capital lease liability		(248)	(470)
Reclamation obligations		(834)	(646)
Long term capital lease liability			(81)
Deferred income tax liabilities		(6,744)	(8,430)
Liabilities		$ 75,181	$ 70,856
Black Fox
ACQUISITIONS
Purchase price	$ 35,000
Adjustments to purchase price	(7,500)
Total fair value of assets acquired and liabilities assumed	27,500
Fair value of assets acquired and liabilities assumed:
Cash	249
Accounts Receivable	470
Prepaids	63
Inventory	4,704
Mineral Property Interests	8,954
Property, Plant and Equipment	33,683
Accounts Payable	(5,247)
Accrued Liabilities	(3,213)
Short term capital lease liability	(557)
Reclamation obligations	(11,233)
Long term capital lease liability	(172)
Deferred income tax liabilities	(201)
Total fair value of assets acquired and liabilities assumed	$ 27,500