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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2018
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, 2018
 
December 31, 2017
 
Cost
 
Accumulated
Depreciation
 
Net Book Value
 
Cost
 
Accumulated
Depreciation
 
Net Book
Value
Plant and equipment
 
 
 
 
 
 
 
 
 
 
 
Nichols Ranch
$
29,210

 
$
(12,021
)
 
$
17,189

 
$
29,210

 
$
(9,971
)
 
$
19,239

Alta Mesa
13,656

 
(2,319
)
 
11,337

 
13,626

 
(1,388
)
 
12,238

Equipment and other
13,444

 
(12,127
)
 
1,317

 
13,367

 
(11,768
)
 
1,599

Plant and equipment total
$
56,310

 
$
(26,467
)
 
$
29,843

 
$
56,203

 
$
(23,127
)
 
$
33,076