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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2017
Accounting Policies [Abstract]  
Schedule of Property, Plant and Equipment Useful Lives
Where straight-line depreciation is utilized, the range of useful lives for various asset classes is generally as follows:
•
Buildings
15 years
•
Shop tools and equipment
3-5 years
•
Mining equipment
5 years
•
Office equipment
4-5 years
•
Furniture and fixtures
5-7 years
•
Light trucks & utility vehicles
5 years
The following is a summary of plant and equipment:
 
December 31, 2017
 
December 31, 2016
 
Cost
 
Accumulated
Depreciation
 
Net Book Value
 
Cost
 
Accumulated
Depreciation
 
Net Book
Value
Plant and equipment
 
 
 
 
 
 
 
 
 
 
 
Nichols Ranch
$
29,210

 
$
(9,971
)
 
$
19,239

 
$
29,210

 
$
(6,804
)
 
$
22,406

Alta Mesa
13,626

 
(1,388
)
 
12,238

 
13,626

 
(456
)
 
13,170

Equipment and other
13,367

 
(11,768
)
 
1,599

 
13,367

 
(11,361
)
 
2,006

Plant and equipment total
$
56,203

 
$
(23,127
)
 
$
33,076

 
$
56,203

 
$
(18,621
)
 
$
37,582