| 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 |
| Revenues: |
| Mexico Operations | 23.3 | 25.6 | | | | | | |
| Velardena Properties | | | 5.6 | 7.7 | 7.2 | 6.7 | 6.4 | 8.1 |
| Total revenues [+] | 23.3 | 25.6 | 5.6 | 7.7 | 7.2 | 6.7 | 6.4 | 8.1 |
| Mineral sales | | | | | | | | 7.4 |
| Lease / rental | | | | | | 6.7 | 6.4 | 0.7 |
| Revenue growth [+] | -9.0% | 354.1% | -27.1% | 7.1% | 7.9% | 4.5% | -20.7% | 3334.5% |
| Mexico Operations | -9.0% | | | | | | | |
| Velardena Properties | | | -27.1% | 7.1% | 7.9% | 4.5% | -20.7% | 3334.5% |
| Cost of goods sold | 17.5 | 13.3 | 9.8 | 11.3 | 2.3 | 8.2 | 9.1 | 15.9 |
| Gross profit | 5.7 | 12.3 | -4.2 | -3.6 | 4.9 | -1.5 | -2.7 | -7.8 |
| Gross margin | 24.7% | 48.0% | -74.4% | -46.2% | 68.3% | -22.3% | -41.8% | -96.4% |
| Selling, general and administrative [+] | 4.5 | 4.8 | 3.7 | 3.6 | 3.4 | 3.5 | 3.9 | 4.2 |
| General and administrative | 4.5 | 4.8 | 3.7 | 3.6 | 3.4 | 3.5 | 3.9 | 4.2 |
| Other operating expenses | 11.0 | 8.3 | 0.0 | -3.2 | 2.4 | -2.1 | -1.8 | 0.5 |
| EBITDA [+] | -9.8 | -0.9 | -7.8 | -4.0 | -0.8 | -2.9 | -4.8 | |
| EBITDA growth | 1043.5% | -89.1% | 98.4% | 400.6% | -72.9% | -39.0% | -71.9% | -24.0% |
| EBITDA margin | -42.0% | -3.3% | -139.0% | -51.1% | -10.9% | -43.5% | -74.6% | -210.3% |
| Depreciation and amortization | 0.4 | 0.6 | 1.0 | 1.1 | 1.2 | 1.0 | 1.5 | |
| EBIT [+] | -10.1 | -1.5 | -8.8 | -5.0 | -2.0 | -3.9 | -6.3 | -17.0 |
| EBIT growth | 592.1% | -83.3% | 74.3% | 157.6% | -49.3% | -38.9% | -62.8% | -24.0% |
| EBIT margin | -43.6% | -5.7% | -156.1% | -65.3% | -27.2% | -57.7% | -98.8% | -210.3% |
| Non-recurring items [+] | | | | | | | | 13.2 |
| Asset impairment | | | | | | | | 13.2 |
| Interest income, net [+] | | | -0.1 | -0.2 | 0.1 | 0.0 | -0.1 | 3.0 |
| Interest expense | | | 0.1 | 0.2 | | | 0.5 | 0.1 |
| Interest income | | | | | 0.1 | 0.0 | 0.4 | 3.1 |
| Other income (expense), net [+] | 0.3 | -0.2 | -0.1 | -0.1 | -0.1 | -0.1 | -4.2 | 1.8 |
| Gain (loss) on debt retirement | | | | | | | -1.7 | |
| Gain (loss) on derivative instruments | | | | | | | -0.8 | 0.6 |
| Gain (loss) on foreign currency transactions | 0.3 | 0.2 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Change in fair value of warrants | | | | | | | -1.7 | 1.3 |
| Other | | | | | | | | 4.8 |
| Pre-tax income | -9.8 | -1.6 | -9.0 | -5.4 | -1.9 | -3.9 | -10.7 | -25.4 |
| Income taxes | 0.1 | 0.5 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Tax rate | | | | | | | 0.0% | 0.0% |
| Net income | -9.9 | -2.1 | -9.1 | -5.4 | -1.9 | -3.9 | -10.7 | -25.4 |
| Net margin | -42.5% | -8.2% | -161.2% | -69.7% | -27.0% | -58.2% | -166.5% | -314.5% |
| |
| Basic EPS [+] | ($0.06) | ($0.01) | ($0.07) | ($0.05) | ($0.02) | ($0.04) | ($0.13) | ($0.48) |
| Growth | 362.6% | -81.2% | 29.4% | 157.6% | -51.9% | -67.0% | -72.8% | 16.8% |
| Diluted EPS [+] | ($0.06) | ($0.01) | ($0.07) | ($0.05) | ($0.02) | ($0.04) | ($0.13) | ($0.48) |
| Growth | 362.6% | -81.2% | 29.4% | 157.6% | -51.9% | -67.0% | -72.8% | 16.8% |
| |
| Shares outstanding (basic) [+] | 165.5 | 161.9 | 131.8 | 101.1 | 94.0 | 90.5 | 81.7 | 53.0 |
| Growth | 2.2% | 22.9% | 30.4% | 7.5% | 3.9% | 10.8% | 54.1% | 15.5% |
| Shares outstanding (diluted) [+] | 165.5 | 161.9 | 131.8 | 101.1 | 94.0 | 90.5 | 81.7 | 53.0 |
| Growth | 2.2% | 22.9% | 30.4% | 7.5% | 3.9% | 10.8% | 54.1% | 15.5% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |