| In millions, except per share items | Dec-31-19 | Dec-31-18 | Dec-05-18 | Dec-31-17 | Dec-05-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 |
| | 10-K | 10-K | 8-K | 10-K | 8-K | 10-K | 10-K | 10-K |
| Cash flows from operating activities: | | | | | | | | |
| Net loss | -25.1 | -36.3 | | -15.2 | | -12.0 | 6.7 | 5.3 |
| Reconciliation of net loss to net cash (used in) from operating activities: | | | | | | | | |
| Depreciation of fixed assets and leases | 3.7 | 2.6 | | 1.7 | | 0.9 | 0.6 | 0.4 |
| Provision for bad debt | -0.4 | 0.5 | | 1.8 | | 0.3 | | |
| Provision for write down of inventory | -0.5 | 1.4 | | 2.1 | | 1.4 | 0.1 | 0.2 |
| Stock based compensation | 1.1 | 2.0 | | 3.3 | | 3.0 | 2.3 | 0.8 |
| (Accretion) amortization of debt costs and debt discount/premium | 6.5 | 9.2 | | | | | | |
| Amortization of intangible assets | 3.0 | 3.1 | | 2.9 | | 2.8 | 0.5 | 0.1 |
| Non cash lease expense | 0.4 | | | | | | | |
| Foreign currency exchange (gain)/loss | 1.5 | 3.4 | | -7.7 | | 0.9 | -0.1 | |
| Loss on impairment of intangible assets | | 1.9 | | 0.1 | | 0.0 | | |
| Non cash interest expense | 8.5 | | | | | | | |
| Gain on debt restructuring | | 0.1 | | | | 0.2 | | 0.1 |
| Change in the fair value of derivative liabilities | | | | | | | | |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable | -3.7 | -4.0 | | 6.0 | | -7.9 | 1.3 | -9.4 |
| Inventories | -6.1 | -1.9 | | -5.3 | | -5.0 | -3.6 | -0.1 |
| Prepaid expenses, other current receivables, and assets | 0.8 | 0.2 | | -0.7 | | 3.4 | -5.4 | -1.1 |
| Accounts payable and accrued expenses | 0.4 | -3.4 | | 1.6 | | 2.8 | -2.8 | 2.3 |
| Operating liabilities | -0.4 | | | | | | | |
| Net cash used in operating activities | -18.4 | -13.3 | | 0.4 | | -0.4 | -15.5 | -3.9 |
| |
| Cash flows from investing activities: | | | | | | | | |
| Capital expenditures | -8.2 | -25.3 | | -40.4 | | -16.7 | -6.0 | -0.8 |
| Net cash used in investing activities | -8.2 | -25.3 | | -40.4 | | -20.1 | -53.1 | -3.8 |
| |
| Cash flows from financing activities: | | | | | | | | |
| Proceeds from ATM | | | | | | | | |
| Debt issuance costs | -3.1 | -6.2 | | | | | | |
| Net cash provided by financing activities | 30.4 | 25.3 | | 0.3 | | 0.0 | -3.1 | 164.5 |
| |
| Supplemental Cash flow information: | | | | | | | | |
| Cash payments for interest | 5.6 | 7.3 | | 5.4 | | 5.4 | 5.5 | 0.2 |
| Cash payments for income taxes | 0.2 | 0.1 | | 0.1 | | 0.1 | 0.1 | 0.0 |
| Non-cash operating, investing and financing transactions: | | | | | | | | |
| Acquisition of capital expenditures in accounts payable and accrued expenses | 0.0 | 0.6 | | 3.2 | | 1.8 | | |
| Capitalized stock compensation in capital expenditures | 0.0 | 0.1 | | 0.1 | | 0.1 | | |
| Issuance of Series D preferred stock | | | | | | | | |