| 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 |
| Cash flows provided by (used in) operating activities: | | | | | | | | |
| Net loss | -146.8 | -154.3 | -155.2 | -143.9 | -109.2 | -86.2 | -61.1 | -46.3 |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Depreciation | 34.7 | 33.9 | 32.7 | 29.0 | 20.7 | 13.3 | 5.8 | 1.5 |
| Amortization of debt issuance costs | 5.9 | 5.8 | 5.7 | 4.6 | 1.3 | 1.2 | 1.2 | 2.1 |
| Non-cash interest expense | 3.8 | 3.1 | 2.1 | 1.2 | 1.4 | | | 3.8 |
| Loss on disposal of property and equipment | 0.0 | 0.0 | 0.0 | | | | | |
| Stock-based compensation | 9.2 | 8.8 | 8.5 | 12.5 | 7.3 | 7.7 | 7.9 | 2.8 |
| Warrants issued in legal settlement | | | | | | | | |
| Accounts receivable | -1.6 | -6.8 | -5.8 | -4.7 | -9.8 | -3.7 | -1.3 | -0.4 |
| Inventories | 2.1 | 1.4 | 1.2 | 0.0 | -2.2 | -1.6 | -1.3 | 0.0 |
| Prepaid expenses and other current assets | -1.7 | -1.1 | -5.7 | -4.7 | -2.1 | -2.5 | -1.4 | 0.8 |
| Accounts payable | -1.2 | 1.9 | -2.3 | 7.2 | 8.1 | 6.1 | 9.1 | 0.4 |
| Accrued expenses and other current liabilities | 2.5 | 14.1 | 16.7 | 27.0 | 27.3 | 15.0 | 8.9 | 0.9 |
| Net cash used in operating activities | -85.5 | -85.8 | -95.9 | -66.7 | -53.0 | -46.2 | -27.7 | -34.3 |
| |
| Cash flows provided by (used in) investing activities: | | | | | | | | |
| Purchase of property and equipment | -10.7 | -9.7 | -4.6 | -1.0 | -1.1 | -0.7 | -0.9 | -2.0 |
| Capitalized Development Projects costs | -76.9 | -93.2 | -112.6 | -204.5 | -247.7 | -306.3 | -349.1 | -300.3 |
| Repayment of equipment loans | | | | | | | 15.0 | |
| Net change in investments for Development Projects | | | | | 189.8 | 268.7 | -419.1 | -94.4 |
| Other | | | | 0.0 | | | 0.0 | 0.0 |
| Net cash used in investing activities | -77.0 | -86.7 | -80.1 | -76.1 | -23.9 | -3.3 | 17.3 | -416.7 |
| |
| Cash flows provided by (used in) financing activities: | | | | | | | | |
| Proceeds from issuance of debt | | | | | | | | |
| Proceeds from related party long-term loan | | | | | | | | |
| Proceeds from related party equity contribution | | | | | | | | |
| Repayment of loans | | | | | | | | |
| Series B Preferred Stock dividend payment | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 | -0.1 |
| Proceeds from exercise of stock options and option matching rights | | | | | | | 0.1 | |
| Payment of debt issuance costs and Interest Rate Cap fees | -0.1 | | | | -1.6 | | -3.2 | -23.9 |
| Other payments | | | 0.4 | -1.0 | -1.0 | | -1.5 | |
| Net cash provided by financing activities | 109.3 | 171.9 | 141.4 | 139.5 | 107.6 | 30.5 | 58.6 | 465.6 |
| |
| Supplemental disclosures of cash flow information: | | | | | | | | |
| Cash paid for interest | 54.0 | 45.1 | 46.2 | 43.1 | 43.0 | 48.3 | 50.2 | 38.8 |
| Non-cash investing and financing activities: | | | | | | | | |
| Project Development Costs | | | | | | | | |