| In millions, except per share items | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Cost of revenues | 22.5 | 28.8 | 28.8 | 28.8 | 36.8 | 45.8 | 44.0 | 36.3 |
| Gross profit | 5.9 | 8.1 | 10.9 | 12.5 | 15.0 | 14.7 | 17.6 | 12.0 |
| |
| Operating expenses: | | | | | | | | |
| Research and development | 4.0 | 4.7 | 7.8 | 6.5 | 4.7 | 6.7 | 7.4 | 4.4 |
| Selling, general and administrative | 8.3 | 11.8 | 11.9 | 12.4 | 13.3 | 14.9 | 16.7 | 11.9 |
| Severance and other charges | -0.5 | 7.2 | 1.5 | 1.2 | 1.2 | 0.9 | | |
| Total operating expenses | 11.8 | 23.7 | 21.2 | 20.1 | 19.3 | 22.6 | 24.1 | 15.8 |
| Loss from continuing operations | -5.9 | -15.7 | -10.3 | -7.6 | -4.3 | -7.8 | -6.5 | -3.8 |
| |
| Other income (expense): | | | | | | | | |
| Interest expense, net | -0.3 | -0.7 | 0.0 | -1.2 | -1.4 | -1.5 | -1.2 | -3.6 |
| Loss on extinguishment of debt | -0.2 | -12.4 | | | | | | |
| Gain on sale of DuraFit business | | | | | -0.3 | | | 1.0 |
| Other expense, net | -0.2 | 0.9 | 0.0 | -0.2 | -0.8 | -0.8 | 0.8 | -1.8 |
| Total other income (expense) | 0.7 | -8.8 | 1.5 | -1.4 | -2.2 | -2.2 | 0.4 | -5.5 |
| Loss from continuing operations before income taxes | -5.2 | -24.4 | -8.8 | -9.0 | -6.5 | -10.1 | -6.9 | -9.3 |
| Income tax expense from continuing operations | 0.1 | -1.0 | -0.4 | 0.1 | 0.3 | -0.4 | 0.3 | 0.0 |
| Net loss from continuing operations | -5.3 | -23.5 | -8.4 | -9.1 | -6.8 | -9.7 | -7.2 | -9.3 |
| Net (loss) income from discontinued operations | | | -0.1 | -0.2 | | | | |
| Net loss | -5.3 | -23.5 | -8.5 | -9.3 | -7.1 | -9.7 | -7.3 | -8.3 |
| Foreign currency translation adjustments | 0.4 | -0.9 | -2.5 | -1.8 | -0.9 | 0.6 | -0.5 | 0.7 |
| Comprehensive loss | -4.8 | -24.4 | -11.1 | -11.2 | -8.0 | -9.1 | -7.8 | -7.7 |
| |
| Basic and diluted net (loss) income per common share: | | | | | | | | |
| Net loss from continuing operations (in dollars per share) | | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Net (loss) income from discontinued operations - Basic (in usd per share) | | | 0.0 | 0.0 | 0.0 | | 0.0 | 0.0 |
| Net (loss) income from discontinued operations - Diluted (in usd per share) | | | 0.0 | 0.0 | 0.0 | | 0.0 | 0.0 |
| |
| Net loss (in dollars per share) | ($0.34) | ($3.84) | ($2.71) | ($0.78) | ($0.86) | ($1.34) | ($1.31) | ($6.71) |
| |
| Weighted average shares outstanding - basic and diluted (in shares) | 15.7 | 6.1 | 3.2 | 12.0 | 8.3 | 7.2 | 5.6 | 1.2 |
| Weighted average number of shares outstanding, diluted (in shares) | 15.7 | 6.1 | 3.2 | 12.0 | 8.3 | 7.2 | 5.6 | 1.2 |