| 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 |
| Total revenues | 6.0 | 9.9 | 16.8 | 12.7 | 18.1 | 19.8 | 31.0 | 64.4 |
| Revenue growth | -39.5% | -41.4% | 32.5% | -29.8% | -8.8% | -36.0% | -51.9% | 183.7% |
| Cost of goods sold | 6.3 | 8.2 | 11.6 | 10.7 | 14.7 | 15.0 | 23.3 | 35.1 |
| Gross profit | -0.3 | 1.7 | 5.2 | 2.0 | 3.4 | 4.8 | 7.7 | 29.3 |
| Gross margin | -5.3% | 17.2% | 30.8% | 15.5% | 18.8% | 24.3% | 24.8% | 45.5% |
| Selling, general and administrative | 7.1 | 8.5 | 7.9 | 7.4 | 9.8 | 11.3 | 20.1 | 16.8 |
| Research and development | 1.5 | 1.9 | 1.4 | 1.3 | 2.6 | 2.9 | 3.5 | 2.8 |
| Other operating expenses | | 0.0 | -0.1 | 0.2 | 0.1 | 1.7 | 0.0 | 0.5 |
| EBITDA [+] | -8.8 | -8.5 | -3.9 | -6.6 | -8.6 | -10.4 | -15.2 | 9.4 |
| EBITDA growth | 3.3% | 119.2% | -41.4% | -22.6% | -17.8% | -31.4% | -261.8% | -1101.5% |
| EBITDA margin | -147.4% | -86.4% | -23.1% | -52.2% | -47.3% | -52.5% | -49.0% | 14.6% |
| Depreciation and amortization | 0.2 | 0.2 | 0.2 | 0.3 | 0.5 | 0.7 | 0.8 | 0.3 |
| EBIT [+] | -9.0 | -8.7 | -4.1 | -7.0 | -9.1 | -11.1 | -16.0 | 9.1 |
| EBIT growth | 2.9% | 113.9% | -41.5% | -23.4% | -18.1% | -30.6% | -275.3% | -913.4% |
| EBIT margin | -150.1% | -88.3% | -24.2% | -54.7% | -50.2% | -55.9% | -51.6% | 14.2% |
| Non-recurring items [+] | 0.3 | | | | | 0.2 | 0.8 | -0.5 |
| Asset impairment | 0.3 | | | | | 0.2 | 0.9 | |
| Loss (gain) on sale of assets | | | | | | | 0.0 | -0.5 |
| Interest expense | 1.0 | 0.8 | 0.5 | 0.3 | 0.0 | 0.0 | | 0.1 |
| Interest expense | 1.0 | 0.8 | 0.5 | 0.3 | 0.0 | 0.0 | | 0.1 |
| Other income (expense), net [+] | 0.0 | 1.6 | -1.4 | -0.1 | 0.0 | -0.1 | 0.0 | 0.1 |
| Gain (loss) on debt retirement | | | -0.3 | | | | | |
| Change in fair value of warrants | | | 1.1 | | | | | |
| Other non-ooperating expenses | 0.1 | 0.1 | | | | | | |
| Other | 0.0 | 0.8 | -0.1 | -0.1 | 0.0 | -0.1 | 0.0 | 0.1 |
| Pre-tax income | -10.3 | -7.9 | -6.0 | -7.4 | -9.1 | -11.4 | -16.8 | 9.6 |
| Income taxes | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.1 | 0.0 | 0.1 |
| Tax rate | | 0.0% | 0.1% | | | 1.0% | | 1.5% |
| Net income | -10.3 | -7.9 | -6.0 | -7.4 | -9.1 | -11.3 | -16.9 | 8.8 |
| Net margin | -172.6% | -80.1% | -35.7% | -58.2% | -50.3% | -56.9% | -54.5% | 13.6% |
| |
| Basic EPS [+] | ($1.27) | ($1.73) | ($1.83) | ($3.01) | ($0.76) | ($0.96) | ($1.45) | $0.91 |
| Growth | -26.7% | -5.6% | -39.0% | 296.3% | -20.8% | -33.8% | -258.9% | -267.4% |
| Diluted EPS [+] | ($1.27) | ($1.73) | ($1.83) | ($3.01) | ($0.76) | ($0.96) | ($1.45) | $0.88 |
| Growth | -26.7% | -5.6% | -39.0% | 296.3% | -20.8% | -33.8% | -264.1% | -262.1% |
| |
| Shares outstanding (basic) [+] | 8.1 | 4.6 | 3.3 | 2.5 | 12.0 | 11.8 | 11.7 | 10.4 |
| Growth | 77.8% | 39.5% | 32.8% | -79.5% | 1.6% | 1.1% | 12.1% | 33.2% |
| Shares outstanding (diluted) [+] | 8.1 | 4.6 | 3.3 | 2.5 | 12.0 | 11.8 | 11.7 | 10.8 |
| Growth | 77.8% | 39.5% | 32.8% | -79.5% | 1.6% | 1.1% | 8.6% | 37.6% |
| |
| EBIT is a non-GAAP figure that excludes all non-recurring expenses: restructuring costs, asset impairments, IPR&D writeoffs, and other unusual charges. |