| 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 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 0.1 | -0.3 |
| Revenue growth | | | | | -100.0% | 223.7% | -125.2% | -520.4% |
| Cost of goods sold [+] | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | 0.1 | 0.1 |
| Maintenance and operations costs | | | | | | 0.1 | | |
| Other direct costs | | | | | | 0.1 | | |
| Gross profit | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | 0.1 | 0.0 | -0.3 |
| Gross margin | | | | | | 25.9% | -24.9% | 128.4% |
| Selling, general and administrative [+] | 0.3 | 0.5 | 0.5 | 0.3 | 0.4 | 0.5 | 0.4 | 0.5 |
| Sales and marketing | | | | | | | 0.2 | 0.2 |
| General and administrative [+] | 0.3 | 0.5 | 0.5 | 0.3 | 0.4 | 0.5 | 0.2 | 0.3 |
| General and administrative expenses | 0.2 | 0.4 | 0.3 | 0.3 | 0.3 | 0.2 | 0.2 | 0.3 |
| Professional fees | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | | | |
| Other selling, general and administrative | | | | | | | 0.2 | 0.2 |
| Other operating expenses [+] | 0.0 | 0.1 | 1.2 | 1.2 | 3.3 | 0.6 | -1.2 | 0.2 |
| Exploration expenses | | 0.0 | | | | 0.1 | 0.1 | 0.1 |
| EBITDA [+] | | | -1.7 | -1.6 | -3.7 | -1.0 | 0.8 | -1.0 |
| EBITDA growth | -32.9% | -61.8% | 6.0% | -56.0% | 276.7% | -230.8% | -174.2% | -150.0% |
| EBITDA margin | | | | | | -454.2% | 1124.4% | 382.0% |
| Depreciation and amortization | | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.1 |
| EBIT [+] | -0.4 | -0.7 | -1.7 | -1.6 | -3.7 | -1.0 | 0.7 | -1.1 |
| EBIT growth | -32.9% | -61.8% | 6.0% | -56.0% | 272.4% | -237.6% | -166.9% | -157.9% |
| EBIT margin | | | | | | -460.0% | 1082.6% | 407.9% |
| Non-recurring items [+] | 0.0 | 0.1 | 0.2 | 0.1 | | | 0.0 | -0.9 |
| Loss (gain) on sale of assets | | | | | | | 0.0 | -0.9 |
| Legal settlement | 0.0 | 0.1 | 0.2 | 0.1 | | | | |
| (Gain) loss on debt repurchase | | | | | | | | 0.0 |
| Interest expense, net [+] | 0.3 | 0.2 | 0.2 | 0.9 | 0.9 | 0.2 | 0.1 | 0.1 |
| Interest expense | 0.3 | 0.2 | 0.2 | 0.9 | 0.9 | 0.2 | 0.1 | 0.1 |
| Interest income | | | | | | | | 0.0 |
| Other income (expense), net [+] | -0.3 | -0.8 | 0.0 | 0.0 | 0.9 | 0.3 | -1.4 | 0.3 |
| Litigation settlement | -0.5 | | | | | | | |
| Gain (loss) on debt retirement | | | | | | -0.1 | | 0.0 |
| Gain (loss) on foreign currency transactions | | | | 0.0 | | | | |
| Other | -0.3 | -0.8 | 0.0 | | 0.9 | 0.2 | 0.1 | -0.1 |
| Pre-tax income | -1.1 | -1.8 | -2.2 | -2.6 | -3.8 | -1.0 | -0.7 | 0.1 |
| Income taxes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Tax rate | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
| Net income | -1.1 | -1.8 | -2.2 | -2.6 | -3.8 | -1.0 | -1.0 | 0.0 |
| Net margin | | | | | | -469.0% | -1470.3% | 14.7% |
| |
| Basic EPS [+] | ($0.01) | ($0.01) | ($0.01) | ($0.02) | ($0.03) | ($0.01) | ($0.01) | $0.00 |
| Growth | -43.3% | -31.1% | -21.0% | -32.3% | 253.6% | 3.2% | 2402.6% | -98.4% |
| Diluted EPS [+] | ($0.01) | ($0.01) | ($0.01) | ($0.02) | ($0.03) | ($0.01) | ($0.01) | $0.00 |
| Growth | -43.3% | -31.1% | -21.0% | -32.3% | 253.6% | 3.2% | 2402.6% | -98.4% |
| |
| Dividends per share [+] | | | | | | | | $0.00 |
| Growth | | | | | | | -100.0% | |
| |
| Shares outstanding (basic) [+] | 184.1 | 173.4 | 147.3 | 139.6 | 137.0 | 131.3 | 131.2 | 130.0 |
| Growth | 6.2% | 17.7% | 5.5% | 1.8% | 4.4% | 0.0% | 1.0% | 18.7% |
| Shares outstanding (diluted) [+] | 184.1 | 173.4 | 147.3 | 139.6 | 137.0 | 131.3 | 131.2 | 130.0 |
| Growth | 6.2% | 17.7% | 5.5% | 1.8% | 4.4% | 0.0% | 1.0% | 18.7% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |