| In millions, except per share items | Sep-30-19 | Jun-30-19 | Mar-31-19 | Dec-31-18 | Sep-30-18 | Jun-30-18 | Mar-31-18 | Dec-31-17 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net income | -26.4 | -36.1 | -37.6 | -46.8 | -33.9 | -37.0 | -26.3 | -12.1 |
| Depreciation and amortization [+] | 8.7 | 9.0 | 8.4 | 14.5 | 7.9 | 7.8 | 4.7 | 0.4 |
| Depreciation | 8.7 | 9.0 | 8.4 | 8.7 | 7.9 | 7.8 | 4.7 | 0.4 |
| Amortization of intangible assets | | | | 1.6 | | | | |
| Stock-based compensation | 0.8 | 0.9 | 1.8 | 5.7 | 0.4 | 0.6 | 5.8 | 0.5 |
| Change in working capital [+] | -1.9 | 1.7 | -4.6 | 4.1 | 7.5 | -3.7 | 16.2 | 1.4 |
| Restricted cash | | | | -0.8 | | | | |
| Accounts receivable | -1.0 | -3.5 | -1.9 | 4.9 | -6.2 | -2.6 | -0.8 | -0.2 |
| Inventories | 0.0 | -0.2 | 0.0 | 2.2 | -0.6 | -0.4 | -1.3 | 0.0 |
| Other current assets | -0.6 | 4.1 | -2.8 | -2.4 | 0.0 | -0.5 | -1.8 | 0.2 |
| Accounts payable | -2.1 | 1.2 | 0.0 | -0.3 | 0.9 | -3.0 | 9.6 | 0.6 |
| Other | 1.8 | 0.1 | 0.2 | 0.4 | 13.4 | 2.7 | 10.4 | 0.8 |
| Other operating activities | 4.5 | 5.1 | 4.6 | -1.8 | 3.4 | 2.9 | 1.5 | -0.8 |
| Cash from operations | -14.3 | -19.4 | -27.3 | -24.4 | -14.7 | -29.5 | 1.9 | -10.6 |
| |
| Capital expenditures | -9.3 | -6.7 | -5.2 | -55.7 | -25.5 | -26.1 | -97.2 | -98.9 |
| Purchases of property and equipment | -9.3 | -6.7 | -5.2 | -55.7 | -25.5 | -26.1 | -97.2 | -98.9 |
| Other cash from investing | | | | -0.1 | 6.5 | 26.0 | 96.0 | 95.2 |
| Cash from investing | -9.3 | -6.7 | -5.2 | -55.8 | -19.0 | -0.1 | -1.2 | -3.7 |
| |
| Cash dividends paid | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Repurchase of common stock, net | | | | -2.0 | | | | |
| Option exercises | | | | | | | 0.1 | |
| Financing costs | -0.1 | | | | -0.3 | | -0.3 | -1.0 |
| Other cash from financing | 14.0 | 35.6 | 12.8 | 48.9 | 76.3 | 5.1 | 10.7 | 14.0 |
| Cash from financing | 14.1 | 35.6 | 12.8 | 46.9 | 76.6 | 5.0 | 10.9 | 15.0 |
| |
| Free cash flow | -23.6 | -26.1 | -32.6 | -80.1 | -40.2 | -55.6 | -95.3 | -109.5 |
| Per share (diluted) | ($0.69) | ($0.76) | ($0.95) | ($2.44) | ($1.23) | ($1.70) | ($2.93) | ($3.53) |
| |
| Cash paid for interest | 14.1 | 14.2 | 14.5 | 11.2 | 5.2 | 15.3 | 11.4 | 11.0 |