| In millions, except per share items | Dec-31-19 | Sep-30-19 | Jun-30-19 | Mar-31-19 | Dec-31-18 | Sep-30-18 | Jun-30-18 | Mar-31-18 |
| | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Operating activities | | | | | | | | |
| Net loss | -304.2 | -87.2 | -74.5 | -73.2 | -75.4 | -71.2 | -232.9 | -275.4 |
| |
| Adjustments to reconcile net loss to net cash (used in) from operating activities: | | | | | | | | |
| Depreciation and amortization | 30.7 | 31.5 | 32.1 | 33.4 | 34.6 | 36.0 | 38.9 | 40.9 |
| Amortization of debt issuance costs and original issue discount | 1.5 | 1.4 | 1.4 | 0.7 | 0.7 | 0.7 | 0.7 | 1.2 |
| Provision for doubtful accounts | 0.7 | 0.8 | 0.7 | 0.6 | 0.6 | 0.2 | 0.3 | 0.4 |
| Deferred income taxes | -1.1 | 1.2 | | | 0.9 | -2.4 | | -3.4 |
| Loss (gain) on disposal or impairment of assets | 224.9 | 13.0 | -1.0 | -1.2 | -1.1 | -1.1 | 125.7 | 125.8 |
| Loss on sale of business | | | | | | | | |
| Noncash lease expense | -0.9 | 0.0 | 0.9 | 0.6 | | | | |
| Stock compensation expense | 2.9 | 2.9 | 2.9 | 3.5 | 3.6 | 4.1 | 4.4 | 4.4 |
| Repayment of PIK accrual on notes payable, related parties | -2.0 | | | | | | | |
| Change in fair value of derivative instruments | | | | | -2.5 | -2.3 | -2.4 | -1.9 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Trade accounts and other receivables | 21.6 | 14.9 | 16.9 | 5.3 | 1.5 | -6.1 | -10.2 | -12.5 |
| Inventories | 12.2 | 14.9 | 19.2 | 18.4 | 14.2 | 10.1 | 6.7 | 10.0 |
| Accounts payable | -4.7 | -5.7 | -6.1 | -9.4 | -8.8 | -1.2 | 9.1 | 14.2 |
| Accrued expenses | 1.2 | 6.6 | 0.1 | -2.2 | 3.7 | 2.7 | 2.5 | 5.3 |
| Income tax receivable, net | -0.8 | -0.8 | 0.0 | 0.0 | 0.1 | 0.8 | 0.9 | 1.1 |
| Other, net | 0.0 | 0.3 | 0.9 | 1.3 | 3.2 | 3.6 | 3.7 | 3.6 |
| Net cash used in operating activities | -11.5 | -4.1 | -5.9 | -18.1 | -21.6 | -23.6 | -28.2 | -45.9 |
| |
| Investing activities | | | | | | | | |
| Capital expenditures | -2.2 | -2.6 | -1.9 | | -2.0 | -1.7 | -1.2 | |
| |
| Investment in PicOnyx | | | | | | | | |
| Issuance of Note from PicOnyx | | | | | | | | |
| Payment of Millen sale post-closing matters | -1.5 | | | | | | | |
| Net proceeds from asset sales | 1.1 | 23.1 | 27.6 | 27.6 | 27.5 | 5.3 | 22.9 | 22.3 |
| Net cash (used in) provided by investing activities | -4.3 | 19.0 | 24.4 | 25.3 | 25.5 | 3.2 | 19.1 | 18.6 |
| |
| Financing activities | | | | | | | | |
| Proceeds from issuance of common stock under ATM program | | | | | | | | |
| Repayments on long-term debt | | | -14.5 | | | | | |
| Proceeds from long-term debt | | | 14.5 | | | | | |
| Repayments on notes payable | -2.7 | -2.3 | -1.8 | -1.5 | -1.4 | -0.9 | -0.5 | -0.4 |
| Payment of debt issuance costs | | | -0.2 | | | | | |
| Purchase of common stock | | | | -0.3 | | | | -0.4 |
| Net cash (used in) provided by financing activities | -23.6 | -23.2 | -22.7 | 4.4 | 1.0 | 1.1 | 13.4 | 5.5 |
| Net (decrease) increase in cash and cash equivalents and restricted cash | -39.3 | | | | | | | |
| |
| Supplemental cash flow information | | | | | | | | |
| Interest paid | 6.8 | 7.7 | 8.3 | 7.7 | 7.7 | 6.8 | 5.4 | 4.5 |
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| Income taxes paid | | | | | | | | |