PROPERTY AND EQUIPMENT (Details) - USD ($)
|
6 Months Ended |
12 Months Ended |
|
Jun. 30, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 9,720,593
|
$ 9,741,584
|
$ 9,786,896
|
| Less: accumulated depreciation |
(6,883,150)
|
(6,438,218)
|
(5,475,916)
|
| Total property and equipment, net |
2,837,443
|
$ 3,303,366
|
4,310,980
|
| Estimated Life |
|
0 years
|
|
| Furniture and fixtures |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 56,995
|
$ 56,995
|
56,995
|
| Estimated Life |
5 years
|
5 years
|
|
| Office and computer equipment |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 436,173
|
$ 434,563
|
416,363
|
| Office and computer equipment | Maximum |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Estimated Life |
5 years
|
5 years
|
|
| Office and computer equipment | Minimum |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Estimated Life |
1 year
|
1 year
|
|
| Land |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 358,886
|
$ 358,886
|
358,886
|
| Building and improvements |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 823,131
|
$ 823,131
|
820,182
|
| Building and improvements | Maximum |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Estimated Life |
25 years
|
25 years
|
|
| Building and improvements | Minimum |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Estimated Life |
5 years
|
5 years
|
|
| Site costs |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 1,518,129
|
$ 1,417,704
|
1,412,624
|
| Estimated Life |
10 years
|
10 years
|
|
| Crushing system |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 2,390,995
|
$ 2,514,021
|
2,505,012
|
| Estimated Life |
20 years
|
20 years
|
|
| Process plant and equipment |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 3,530,460
|
$ 3,530,460
|
3,517,809
|
| Estimated Life |
10 years
|
10 years
|
|
| Vehicles and mining equipment |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Total property and equipment, gross |
$ 605,824
|
$ 605,824
|
$ 699,025
|
| Vehicles and mining equipment | Maximum |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Estimated Life |
10 years
|
10 years
|
|
| Vehicles and mining equipment | Minimum |
|
|
|
| Property, Plant and Equipment [Line Items] |
|
|
|
| Estimated Life |
5 years
|
5 years
|
|