Note 16 - Income Taxes - Deductible Temporary Differences (Details) - USD ($)
$ in Thousands |
Dec. 31, 2021 |
Dec. 31, 2020 |
| Statement Line Items [Line Items] |
|
|
| Deductible temporary differences for which no deferred tax assets have been recognized |
$ 106,671
|
$ 111,716
|
| Non-capital losses [member] |
|
|
| Statement Line Items [Line Items] |
|
|
| Deductible temporary differences for which no deferred tax assets have been recognized |
95,341
|
93,602
|
| Excess of tax value of exploration and evaluation assets over book values [member] |
|
|
| Statement Line Items [Line Items] |
|
|
| Deductible temporary differences for which no deferred tax assets have been recognized |
4,796
|
7,171
|
| Financing fees [member] |
|
|
| Statement Line Items [Line Items] |
|
|
| Deductible temporary differences for which no deferred tax assets have been recognized |
4,912
|
3,453
|
| Other deductible temporary differences for which no deferred tax assets have been recognized [member] |
|
|
| Statement Line Items [Line Items] |
|
|
| Deductible temporary differences for which no deferred tax assets have been recognized |
$ 1,622
|
$ 7,490
|