| Disclosure of detailed information about property, plant and equipment [Table Text Block] |
| |
Mineral
properties
|
|
Plant
|
|
Machinery &
equipment
|
|
Building
|
|
Transport &
office equipment
|
|
Total
|
|
| Cost |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2019 |
|
534,222 |
|
|
104,010 |
|
|
76,476 |
|
|
12,956 |
|
|
13,335 |
|
|
740,999 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Additions |
|
18,656 |
|
|
2,506 |
|
|
7,762 |
|
|
358 |
|
|
808 |
|
|
30,090 |
|
| Disposals |
|
- |
|
|
(71 |
) |
|
(3,235 |
) |
|
- |
|
|
(1,366 |
) |
|
(4,672 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2020 |
$ |
552,878 |
|
$ |
106,445 |
|
$ |
81,003 |
|
$ |
13,314 |
|
$ |
12,777 |
|
$ |
766,417 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Additions |
|
40,261 |
|
|
2,838 |
|
|
15,435 |
|
|
1,623 |
|
|
2,113 |
|
|
62,270 |
|
| Disposals |
|
(81,740 |
) |
|
(11,098 |
) |
|
(9,298 |
) |
|
(1,492 |
) |
|
(2,845 |
) |
|
(106,473 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2021 |
$ |
511,399 |
|
$ |
98,185 |
|
$ |
87,140 |
|
$ |
13,445 |
|
$ |
12,045 |
|
$ |
722,214 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Accumulated amortization and impairment |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2019 |
|
489,763 |
|
|
92,196 |
|
|
50,765 |
|
|
9,860 |
|
|
10,082 |
|
|
652,666 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Amortization |
|
18,676 |
|
|
4,472 |
|
|
4,471 |
|
|
306 |
|
|
1,286 |
|
|
29,211 |
|
| Impairments, net |
|
1,896 |
|
|
(1,782 |
) |
|
310 |
|
|
- |
|
|
|
|
|
424 |
|
| Disposals |
|
- |
|
|
(71 |
) |
|
(2,424 |
) |
|
- |
|
|
(1,344 |
) |
|
(3,839 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2020 |
$ |
510,335 |
|
$ |
94,815 |
|
$ |
53,122 |
|
$ |
10,166 |
|
$ |
10,024 |
|
$ |
678,462 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Amortization |
|
15,614 |
|
|
3,393 |
|
|
4,947 |
|
|
352 |
|
|
1,202 |
|
|
25,508 |
|
| Disposals |
|
(81,180 |
) |
|
(10,000 |
) |
|
(8,624 |
) |
|
(1,324 |
) |
|
(2,825 |
) |
|
(103,953 |
) |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Balance at December 31, 2021 |
$ |
444,769 |
|
$ |
88,208 |
|
$ |
49,445 |
|
$ |
9,194 |
|
$ |
8,401 |
|
$ |
600,017 |
|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Net book value |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| At December 31, 2020 |
$ |
42,543 |
|
$ |
11,630 |
|
$ |
27,881 |
|
$ |
3,148 |
|
$ |
2,753 |
|
$ |
87,955 |
|
| At December 31, 2021 |
$ |
66,630 |
|
$ |
9,977 |
|
$ |
37,695 |
|
$ |
4,251 |
|
$ |
3,644 |
|
$ |
122,197 |
|
|