| In millions, except per share items | Jun-30-15 | Mar-31-15 | Dec-31-14 | Sep-30-14 | Jun-30-14 | Mar-31-14 | Dec-31-13 | Sep-30-13 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net sales | 163.9 | 159.3 | 163.8 | 188.3 | 193.0 | 179.3 | 194.0 | 194.4 |
| Net sales growth | -15.1% | -11.2% | -15.6% | -3.1% | -15.2% | -13.6% | -2.2% | -6.8% |
| Cost of sales | -137.5 | -139.3 | -148.5 | -167.1 | -175.9 | -162.2 | -181.2 | -170.4 |
| Gross profit | 26.4 | 20.0 | 15.3 | 21.2 | 17.1 | 17.1 | 12.8 | 24.0 |
| Gross margin | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Selling and administrative expenses | 21.4 | 23.3 | 22.5 | 22.4 | 24.3 | 23.0 | 23.9 | 23.6 |
| Other income (expense), net | 0.6 | 2.7 | 1.3 | 2.0 | 1.8 | 4.2 | 5.6 | 3.6 |
| Impairments, restructuring charges, and other items | -3.7 | -1.5 | -1.8 | -2.1 | -0.8 | -4.1 | -0.8 | -7.4 |
| Operating income (loss) | 1.9 | -2.1 | -7.7 | -1.3 | -6.2 | -5.8 | -6.3 | -3.4 |
| Operating margin | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% | 100.0% |
| Interest expense | -1.8 | -1.8 | -2.7 | -2.6 | -2.4 | -2.3 | -2.4 | -2.2 |
| Interest income | 2.0 | 0.6 | 1.5 | 0.8 | 0.5 | 0.4 | 0.5 | 0.3 |
| Income (loss) from continuing operations before taxes | 2.1 | -3.3 | -8.9 | -3.1 | -8.1 | -7.7 | -8.2 | -5.3 |
| Tax benefit (expense) | 0.1 | -0.3 | -0.3 | 0.4 | 0.3 | 0.1 | 7.3 | 0.1 |
| Tax rate | 4.8% | 9.1% | 3.4% | | | | | |
| Income (loss) from continuing operations | 2.0 | -3.0 | -8.6 | -3.5 | -8.4 | -7.8 | -15.5 | -5.4 |
| Loss from discontinued operations, net of tax | -0.3 | -0.2 | -0.5 | -0.3 | -0.3 | -3.3 | -1.6 | -0.3 |
| Net income (loss) | 1.7 | -3.2 | -9.1 | -3.8 | -8.7 | -11.1 | -17.1 | -5.7 |
| |
| Basic income (loss) per share (a): | | | | | | | | |
| Loss from continuing operations (in dollars per share) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Loss from discontinued operations (in dollars per share) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| |
| Net loss per share (in dollars per share) | $0.09 | ($0.17) | ($0.49) | ($0.21) | ($0.47) | ($0.60) | ($0.93) | ($0.30) |
| |
| Weighted average shares, basic (in thousands) | 18.6 | 18.5 | 18.5 | 18.5 | 18.5 | 18.5 | 18.5 | 18.5 |
| |
| Earnings Per Share, Diluted [Abstract] | | | | | | | | |
| Loss from discontinued operations (in dollars per share) | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Income (loss) from continuing operations (in dollars per share) | 0.0 | | | | 0.0 | | | |
| Net income (loss) per share (in dollars per share) | $0.09 | ($0.17) | ($0.49) | ($0.21) | ($0.47) | ($0.60) | ($0.93) | ($0.30) |
| Weighted average shares, diluted (in thousands) | 18.7 | 18.5 | 18.5 | 18.5 | 18.5 | 18.5 | 18.5 | 18.5 |
| |