| In millions, except per share items | Sep-30-18 | Jun-30-18 | Mar-31-18 | Dec-31-17 | Sep-30-17 | Jun-30-17 | Mar-31-17 | Dec-31-16 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Cost of revenues | 9.8 | 11.5 | 12.1 | 15.7 | 19.5 | 24.1 | 28.5 | 28.8 |
| Gross profit | 4.4 | 4.2 | 4.7 | 4.4 | 4.3 | 6.3 | 6.8 | 8.1 |
| |
| Operating expenses: | | | | | | | | |
| Research and development | 2.7 | 3.2 | 3.5 | 3.8 | 3.8 | 3.5 | 4.0 | 4.7 |
| Selling, general and administrative | 5.8 | 6.4 | 7.0 | 8.3 | 9.8 | 10.2 | 11.2 | 11.8 |
| Severance and other charges | | | | -0.5 | 4.9 | 5.2 | | 7.2 |
| Total operating expenses | 8.3 | 9.7 | 10.0 | 11.6 | 18.4 | 18.9 | 21.6 | 23.7 |
| Loss from continuing operations | -3.9 | -5.6 | -5.3 | -7.2 | -14.1 | -12.6 | -14.8 | -15.7 |
| |
| Other income (expense): | | | | | | | | |
| Interest expense, net | | | | -0.3 | 0.6 | 0.2 | -0.4 | -0.7 |
| Loss on extinguishment of debt | | | | | | | -12.6 | |
| Gain on sale of DuraFit business | | | | | 0.8 | | | |
| Other expense, net | 0.0 | -0.2 | -0.2 | -0.2 | 0.0 | 0.3 | 1.1 | 0.9 |
| Total other income (expense) | 0.7 | 1.9 | 1.8 | 0.9 | 1.6 | -11.5 | -9.5 | -9.2 |
| Loss from continuing operations before income taxes | -3.2 | -3.6 | -3.7 | -6.5 | -12.7 | -24.2 | -24.3 | -24.4 |
| Income tax expense from continuing operations | 0.8 | 0.7 | 0.1 | 0.1 | 0.3 | 0.3 | -0.5 | -1.0 |
| Net loss from continuing operations | -4.0 | -4.3 | -3.8 | -6.6 | -13.1 | -24.6 | -23.8 | -23.5 |
| Net (loss) income from discontinued operations | -1.1 | 0.2 | | | 1.3 | 0.6 | | |
| Net loss | -5.1 | -4.0 | -2.5 | -5.3 | -11.7 | -24.0 | -23.8 | -23.5 |
| Foreign currency translation adjustments | -0.1 | 0.1 | 0.6 | 0.4 | -0.1 | -0.5 | -1.2 | -0.9 |
| Comprehensive loss | -5.2 | -3.9 | -1.9 | -4.8 | -11.9 | -24.4 | -25.0 | -24.4 |
| |
| 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 | | |
| Net (loss) income from discontinued operations - Basic (in usd per share) | 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 | | |
| |
| Net loss (in dollars per share) | ($0.61) | ($0.35) | ($0.24) | ($0.42) | ($0.67) | ($2.70) | ($2.75) | ($3.31) |
| |
| Weighted average shares outstanding - basic and diluted (in shares) | 11.9 | 12.6 | 8.7 | 8.7 | 6.2 | 6.9 | 7.9 | 4.9 |
| Weighted average number of shares outstanding, diluted (in shares) | 12.8 | 12.6 | 8.7 | 8.7 | 6.2 | 6.9 | 7.9 | 4.9 |