PROPERTY AND EQUIPMENT (Tables)
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Property, Plant and Equipment [Abstract]    
Property, Plant and Equipment
Property and equipment consisted of the following: 
 
 
Estimated Life
 
 
June 30,

‎
2018
 
 
December 31,

‎
2017
 
 
 
 
 
 
(Unaudited)
 
 
 
 
Furniture and fixtures
 
 
5 years
 
 
$
56,995
 
 
$
56,995
 
Office and computer equipment
 
 
1 - 5 years
 
 
 
436,173
 
 
 
434,563
 
Land
 
 
—
 
 
 
358,886
 
 
 
358,886
 
Building and improvements
 
 
5 - 25 years
 
 
 
823,131
 
 
 
823,131
 
Site costs
 
 
10 years
 
 
 
1,518,129
 
 
 
1,417,704
 
Crushing system
 
 
20 years
 
 
 
2,390,995
 
 
 
2,514,021
 
Process plant and equipment
 
 
10 years
 
 
 
3,530,460
 
 
 
3,530,460
 
Vehicles and mining equipment
 
 
5 - 10 years
 
 
 
605,824
 
 
 
605,824
 
 
 
 
 
 
 
 
9,720,593
 
 
 
9,741,584
 
Less: accumulated depreciation
 
 
 
 
 
 
(6,883,150
)
 
 
(6,438,218
)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$
2,837,443
 
 
$
3,303,366
 
Property and equipment consisted of the following:
 
  
Estimated Life
 
December 31,
2017
  
December 31,
2016
 
         
Furniture and fixtures 5 years $56,995  $56,995 
Office and computer equipment 1 - 5 years  434,563   416,363 
Land —  358,886   358,886 
Building and improvements 5 - 25 years  823,131   820,182 
Site costs 10 years  1,417,704   1,412,624 
Crushing system 20 years  2,514,021   2,505,012 
Process plant and equipment 10 years  3,530,460   3,517,809 
Vehicles and mining equipment 5 - 10 years  605,824   699,025 
     9,741,584   9,786,896 
Less: accumulated depreciation    (6,438,218)  (5,475,916)
           
    $3,303,366  $4,310,980