| In millions, except per share items | Mar-31-19 | Sep-30-18 | Jun-30-18 | Mar-31-18 | Dec-31-17 | Sep-30-17 | Jun-30-17 | Mar-31-17 |
| | 10-Q | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| OPERATING ACTIVITIES: | | | | | | | | |
| Net loss | | -39.0 | -43.1 | -41.9 | -43.1 | -46.5 | -39.5 | -27.3 |
| Less: Income from discontinued operations, net of income taxes | | | | -1.3 | | | | |
| Loss from continuing operations | | | | -10.5 | | | | |
| |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Depreciation | | 7.8 | 8.0 | 8.3 | 8.8 | 9.1 | 9.3 | 9.4 |
| Amortization of intangible assets | | 1.2 | 1.2 | 1.1 | 0.8 | 0.5 | 0.2 | |
| Non-cash interest expense | | 1.8 | 1.3 | 0.9 | 0.4 | 0.0 | | |
| Defined benefit plan cost | | 0.1 | 0.0 | 0.0 | -0.3 | 0.0 | -0.3 | 0.0 |
| Stock-based compensation expense | | 9.6 | 10.4 | 9.9 | 9.0 | 8.2 | 6.5 | 5.7 |
| Gain on sale of property and equipment | | | | 0.0 | | 0.0 | | |
| Provision for losses on inventory | | 2.0 | 2.1 | 2.8 | 2.3 | 1.8 | 1.1 | 0.4 |
| Provision for warranties | | -0.1 | 0.3 | 0.2 | 0.3 | 0.5 | 0.3 | 0.4 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Trade and other accounts receivable | | -5.2 | -1.9 | -7.4 | -8.0 | -3.7 | -1.5 | 3.6 |
| Inventories | | -8.9 | -12.7 | -3.7 | 2.6 | 5.9 | 6.3 | -1.7 |
| Prepaid expenses and other assets | | -0.4 | 1.5 | 0.9 | 0.5 | 1.1 | -0.3 | -1.0 |
| Accounts payable and accrued liabilities | | -12.8 | -0.2 | 7.5 | 9.5 | 9.8 | -0.2 | -3.3 |
| Deferred revenue and other current liabilities | | -1.5 | -0.8 | -0.2 | 2.4 | 2.4 | 1.7 | 3.0 |
| Accrued employee compensation | | -1.8 | -0.9 | -0.8 | 0.6 | 0.7 | -0.7 | -0.5 |
| Deferred tax liability | | 0.5 | 0.1 | 0.1 | -0.2 | 0.9 | 1.8 | 1.7 |
| Defined benefit plan and other long-term liabilities | | -1.0 | -0.5 | -0.5 | -0.2 | -0.3 | -0.7 | -0.7 |
| Net cash used in operating activities - continuing operations | | | | -12.1 | | | | |
| |
| Net cash provided by operating activities - discontinued operations | | | | 0.9 | | | | |
| Net cash provided by operating activities - discontinued operations | | -46.3 | -34.5 | -22.4 | -15.0 | -9.2 | -13.9 | -16.6 |
| |
| INVESTING ACTIVITIES: | | | | | | | | |
| Purchases of property and equipment | | -10.9 | -10.3 | -7.5 | -5.8 | -4.6 | -4.4 | -4.7 |
| Proceeds from sale of property and equipment | | | | 0.0 | | 0.0 | | |
| Net cash used in investing activities - continuing operations | | | | -2.6 | | | | |
| |
| Net cash used in investing activities - discontinued operations | | | | -1.3 | | | | |
| Total net cash used in investing activities | | -12.2 | -11.6 | -7.4 | -4.4 | -3.2 | -3.0 | 15.9 |
| |
| FINANCING ACTIVITIES: | | | | | | | | |
| Payments related to finance lease | | -15.0 | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 |
| Line of credit borrowings | | 20.0 | | 5.0 | | | | |
| Net cash provided by (used in) financing activities - continuing operations | | | | 5.0 | | | | |
| |
| Net cash used in financing activities - discontinued operations | | | | 0.0 | | | | |
| Total net cash provided by (used in) financing activities | | 29.0 | 48.3 | 48.3 | 43.3 | 37.7 | 0.4 | 0.5 |
| Effect of exchange rate changes on cash and cash equivalents | | 0.0 | -0.1 | 0.5 | | 0.7 | 0.8 | 0.3 |
| Decrease in cash and cash equivalents | | | | -10.0 | | | | |