| 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/A | 10-K | 10-K |
| Revenues [+] | 0.0 | 0.0 | 0.0 | 0.2 | 1.8 | 1.5 | 2.0 | 1.0 |
| Products | | | | | | | | 0.0 |
| Grants | | | | | | | 2.0 | 1.0 |
| Revenue growth | | | -100.0% | -88.9% | 20.4% | -27.3% | 106.9% | -65.2% |
| Cost of goods sold | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.9 |
| Gross profit | 0.0 | 0.0 | 0.0 | 0.2 | 1.8 | 1.5 | 2.0 | 0.1 |
| Gross margin | | | | 100.0% | 100.0% | 100.0% | 100.0% | 5.9% |
| Selling, general and administrative | 10.8 | 14.5 | 14.9 | 12.4 | 7.4 | 6.7 | 8.4 | 11.0 |
| Research and development | 11.1 | 17.8 | 15.4 | 12.7 | 10.6 | 17.4 | 31.7 | 28.9 |
| EBITDA [+] | -21.4 | -32.1 | -30.1 | -24.5 | -15.2 | -22.4 | -37.8 | -39.1 |
| EBITDA growth | -33.4% | 6.4% | 22.9% | 61.7% | -32.1% | -40.8% | -3.4% | -7.8% |
| EBITDA margin | | | | -12391.4% | -848.5% | -1505.5% | -1850.2% | -3963.7% |
| Depreciation | 0.5 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.7 |
| EBITA | -21.9 | -32.3 | -30.3 | -24.7 | -15.3 | -22.5 | -38.0 | -39.8 |
| EBITA margin | | | | -12489.9% | -857.5% | -1518.4% | -1862.7% | -4035.9% |
| Amortization of intangibles | | | | 0.2 | 0.9 | | | |
| EBIT [+] | -21.9 | -32.3 | -30.3 | -24.9 | -16.2 | -22.5 | -38.0 | -39.8 |
| EBIT growth | -32.1% | 6.4% | 21.8% | 53.7% | -28.2% | -40.7% | -4.5% | -7.9% |
| EBIT margin | | | | -12572.2% | -905.8% | -1518.4% | -1862.7% | -4035.9% |
| Non-recurring items [+] | 19.4 | 45.0 | | | | | | |
| Asset impairment | 19.4 | 45.0 | | | | | | |
| Interest expense, net [+] | -0.1 | 0.0 | 0.0 | 0.3 | 1.4 | 1.9 | 2.5 | 4.6 |
| Interest expense | 0.1 | 0.1 | 0.1 | 0.5 | 1.4 | 1.9 | 2.5 | 4.6 |
| Interest income | 0.1 | 0.1 | 0.1 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 |
| Other income (expense), net [+] | 0.7 | -0.3 | -2.2 | -2.2 | -2.9 | 6.0 | 1.0 | -10.8 |
| Gain (loss) on debt retirement | | | | -1.8 | -3.3 | 5.8 | | -11.8 |
| Change in fair value of warrants | | | | | | | 0.2 | 0.9 |
| Other non-operating income | | | | | | 0.1 | 0.8 | 0.2 |
| Other | 0.7 | -0.3 | -2.2 | -0.4 | 0.4 | -0.1 | -0.8 | -16.2 |
| Pre-tax income | -40.6 | -77.6 | -32.6 | -27.5 | -20.5 | -18.4 | -39.5 | -55.2 |
| Income taxes | 1.4 | 10.0 | 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% |
| Net income | -39.2 | -67.6 | -32.6 | -27.5 | -34.8 | -24.8 | -39.5 | -55.2 |
| Net margin | | | | -13876.3% | -1943.8% | -1671.1% | -1933.9% | -5589.7% |
| |
| Basic EPS [+] | ($62.22) | ($136.57) | ($2.08) | ($2.51) | ($7.74) | ($24.14) | ($94.93) | ($7.92) |
| Growth | -54.4% | 6457.7% | -17.2% | -67.5% | -68.0% | -74.6% | 1098.8% | 9.2% |
| Diluted EPS [+] | ($62.22) | ($136.57) | ($2.08) | ($2.51) | ($7.74) | ($24.14) | ($94.93) | ($7.92) |
| Growth | -54.4% | 6457.7% | -17.2% | -67.5% | -68.0% | -74.6% | 1098.8% | 10.4% |
| |
| Shares outstanding (basic) [+] | 0.6 | 0.5 | 15.7 | 10.9 | 4.5 | 1.0 | 0.4 | 7.0 |
| Growth | 27.3% | -96.8% | 43.2% | 143.2% | 337.1% | 147.1% | -94.0% | 14.6% |
| Shares outstanding (diluted) [+] | 0.6 | 0.5 | 15.7 | 10.9 | 4.5 | 1.0 | 0.4 | 7.0 |
| Growth | 27.3% | -96.8% | 43.2% | 143.2% | 337.1% | 147.1% | -94.0% | 13.4% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |