| 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 |
| Revenue | 15.5 | 11.4 | 3.6 | 1.0 | 1.9 | 0.7 | 1.4 | 1.0 |
| Revenue growth | 36.3% | 213.8% | 252.7% | -44.4% | 150.5% | -46.3% | 42.5% | 13.9% |
| Cost of Revenues | 4.3 | 5.0 | 1.2 | 0.5 | 0.7 | 0.2 | 0.6 | 0.3 |
| Gross Margin | 12.4 | 8.0 | 2.9 | 0.5 | 1.2 | 0.5 | | |
| Gross margin | 80.0% | 70.5% | 79.8% | 47.6% | 62.5% | 67.2% | | |
| |
| Operating Expenses: | | | | | | | | |
| General and administrative | 12.6 | 11.7 | 13.7 | 6.4 | 6.8 | 3.0 | 2.7 | 2.7 |
| Research and development | 0.6 | 1.1 | 1.2 | 1.2 | 1.0 | 1.3 | 1.1 | 2.2 |
| Total Operating Expenses | 21.4 | 22.2 | 28.1 | 9.3 | 8.3 | 4.3 | 4.1 | 5.1 |
| Operating Income/(Loss) | -9.0 | -14.1 | -25.2 | -8.8 | -7.2 | -3.8 | -3.3 | -4.4 |
| Operating margin | -57.7% | -124.2% | -694.6% | -854.9% | -388.1% | -517.8% | -241.0% | -459.6% |
| |
| Other Income (Expense): | | | | | | | | |
| Interest expense | | | | | | | | |
| Change in fair value of derivative liabilities | 16.7 | -2.6 | -3.2 | | | | | |
| Loss on issuance of debt | -3.4 | -3.6 | | | | | | |
| Loss on extinguishment of debt | -0.4 | 0.2 | -0.6 | | | | | |
| Other income | | | | | | | | |
| Total Other (Expense)/Income | -1.3 | -13.1 | -5.7 | -1.6 | 0.0 | | 0.0 | 0.0 |
| Provision for Income Taxes | 0.0 | 0.0 | | | | | | |
| Net (Loss)/Income | -10.3 | -27.3 | -30.9 | -10.4 | -11.6 | -5.5 | -6.4 | -4.8 |
| |
| Other Comprehensive Loss | | | | | | | | |
| Foreign currency translation adjustments | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Total Comprehensive (Loss)/Income | -10.3 | -27.3 | -30.9 | -10.4 | -11.7 | -5.5 | -6.5 | -4.8 |
| |
| (Loss) income per Share: | | | | | | | | |
| (Loss) income per share, basic (in dollars per share) | ($0.02) | ($0.05) | ($0.08) | ($0.05) | ($0.08) | ($0.04) | ($0.06) | ($0.08) |
| (Loss) income per share, diluted (in dollars per share) | ($0.02) | ($0.05) | ($0.08) | ($0.05) | ($0.08) | ($0.04) | ($0.06) | ($0.08) |
| |
| Weighted average shares outstanding | | | | | | | | |
| Weighted average shares outstanding, basic (in shares) | 549.5 | 518.4 | 378.1 | 203.6 | 149.5 | 138.8 | 107.6 | 63.0 |
| Weighted average shares outstanding, diluted (in shares) | 549.5 | 518.4 | 378.1 | 203.6 | 149.5 | 138.8 | 107.6 | 63.0 |