| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Operating expenses | | | | | | | | |
| Consulting fees | 0.6 | 0.6 | 0.5 | 0.5 | 0.6 | 0.7 | 0.3 | 0.4 |
| Insurance | 0.2 | 0.2 | 0.1 | 0.1 | 0.2 | 0.3 | 0.3 | 0.3 |
| Investor relations | 0.1 | 0.1 | 0.1 | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 |
| Mineral property exploration | -2.3 | -2.4 | -2.0 | -2.0 | -3.3 | | | |
| Office | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Other | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Professional fees | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.2 | 0.2 |
| Regulatory | 0.1 | 0.2 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.2 |
| Rent | 0.1 | 0.1 | 0.1 | | | | | |
| Travel | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 | 0.1 | | |
| Wages and benefits | 0.9 | 0.9 | 0.8 | 0.8 | 1.9 | 1.9 | 2.2 | 2.6 |
| Total operating expenses | -3.4 | -5.9 | -4.4 | -3.7 | -4.9 | -6.1 | -6.1 | -6.5 |
| |
| Other income (expenses) | | | | | | | | |
| Gain/(Loss) on foreign exchange | 0.3 | -0.1 | -0.2 | -0.4 | 0.5 | -0.4 | -0.3 | 1.0 |
| Interest income | 0.0 | 0.0 | 0.1 | 0.2 | 0.1 | 0.0 | 0.0 | 0.0 |
| Other income | 0.1 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 |
| Total other income (expenses) | 0.4 | -0.1 | -0.3 | -0.5 | 0.7 | -0.7 | -1.1 | 1.6 |
| Net loss for the period | -3.0 | -6.0 | -4.5 | -3.8 | -4.2 | -6.4 | -7.2 | -4.8 |
| |
| Other comprehensive income (loss) | | | | | | | | |
| Exchange difference on translating foreign operations | -0.3 | 0.1 | 0.2 | 0.4 | -0.5 | 0.4 | 0.5 | -1.6 |
| Comprehensive loss for the period | -3.4 | -5.9 | -4.3 | -3.4 | -4.7 | -6.1 | -6.7 | -6.2 |
| |
| Basic loss per share | ($0.02) | ($0.03) | ($0.02) | ($0.02) | ($0.02) | ($0.04) | ($0.06) | ($0.04) |
| Diluted loss per share | ($0.02) | ($0.03) | ($0.02) | ($0.02) | ($0.02) | ($0.04) | ($0.06) | ($0.04) |
| |
| Weighted average number of shares outstanding - basic | 195.2 | 194.9 | 189.9 | 187.4 | 182.0 | 162.3 | 116.7 | 116.3 |
| Weighted average number of shares outstanding - diluted | 195.2 | 194.9 | 189.9 | 187.4 | 182.0 | 162.3 | 116.7 | 116.3 |