| 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 | -17.6 | -9.7 | -11.3 | -9.2 | -8.8 | -13.9 | -10.1 | -10.4 |
| Less: Income from discontinued operations, net of income taxes | | | | -1.3 | | | | |
| Loss from continuing operations | -17.6 | | | -10.5 | | | | |
| |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Depreciation | 1.8 | 2.0 | 2.0 | 1.6 | 2.1 | 2.2 | 2.3 | 2.1 |
| Amortization of intangible assets | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.2 | |
| Operating lease cost | 0.4 | | | | | | | |
| Non-cash interest expense | 0.5 | 0.5 | 0.5 | 0.4 | 0.4 | 0.0 | | |
| Defined benefit plan cost | 0.2 | 0.1 | 0.1 | 0.2 | -0.3 | 0.0 | 0.0 | -0.1 |
| Stock-based compensation expense | 2.1 | 2.0 | 2.7 | 2.4 | 2.5 | 2.8 | 2.3 | 1.5 |
| Gain on sale of property and equipment | | | | 0.0 | | 0.0 | | |
| Provision for (recovery of) losses on accounts receivable | 0.0 | | | 0.0 | | | | |
| Provision for losses on inventory | 0.6 | 0.7 | 0.2 | 0.5 | 0.6 | 0.8 | 0.8 | 0.0 |
| Provision for warranties | 0.1 | 0.0 | 0.1 | 0.1 | -0.3 | 0.4 | 0.0 | 0.2 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Trade and other accounts receivable | 1.7 | -0.2 | 2.2 | -2.8 | -4.3 | 3.1 | -3.4 | -3.4 |
| Inventories | -3.9 | 1.4 | -4.9 | -4.3 | -1.1 | -2.4 | 4.1 | 1.9 |
| Prepaid expenses and other assets | 0.2 | -1.2 | 0.5 | -0.1 | 0.3 | 0.7 | -0.1 | -0.5 |
| Accounts payable and accrued liabilities | 4.9 | -9.1 | -5.1 | 0.4 | 1.0 | 3.5 | 2.6 | 2.4 |
| Deferred revenue and other current liabilities | 0.3 | -0.2 | -1.9 | 0.1 | 0.5 | 0.5 | -1.3 | 2.6 |
| Accrued employee compensation | -0.3 | 0.1 | -0.7 | -0.6 | -0.6 | 1.0 | -0.5 | 0.8 |
| Operating lease liabilities | -0.5 | | | | | | | |
| Deferred tax liability | 0.0 | -0.4 | 0.0 | 0.0 | 0.8 | -0.8 | 0.0 | -0.2 |
| Defined benefit plan and other long-term liabilities | -0.1 | -0.2 | -0.2 | -0.4 | -0.2 | 0.2 | -0.1 | -0.1 |
| Net cash used in operating activities - continuing operations | -9.0 | | | -12.1 | | | | |
| |
| Net cash provided by operating activities - discontinued operations | | | | 0.9 | | | | |
| Net cash provided by operating activities - discontinued operations | -9.0 | -14.0 | -14.8 | -11.2 | -6.2 | -2.3 | -2.7 | -3.8 |
| |
| INVESTING ACTIVITIES: | | | | | | | | |
| Purchases of property and equipment | -0.7 | -1.9 | -3.9 | -2.6 | -2.5 | -1.3 | -1.1 | -0.9 |
| Proceeds from sale of property and equipment | | | | 0.0 | | 0.0 | | |
| Net cash used in investing activities - continuing operations | -0.7 | | | -2.6 | | | | |
| |
| Net cash used in investing activities - discontinued operations | | | | -1.3 | | | | |
| Total net cash used in investing activities | -0.7 | -1.9 | -3.9 | -3.9 | -2.5 | -1.2 | 0.3 | -0.9 |
| |
| FINANCING ACTIVITIES: | | | | | | | | |
| Payments related to finance lease | -0.2 | -15.0 | 0.0 | | 0.0 | 0.0 | 0.0 | 0.0 |
| Line of credit borrowings | | 15.0 | | 5.0 | | | | |
| Net cash provided by (used in) financing activities - continuing operations | -0.2 | | | 5.0 | | | | |
| |
| Net cash used in financing activities - discontinued operations | | | | 0.0 | | | | |
| Total net cash provided by (used in) financing activities | -0.2 | 18.0 | 0.2 | 5.0 | 5.8 | 37.3 | 0.2 | 0.0 |
| Effect of exchange rate changes on cash and cash equivalents | 0.1 | 0.0 | -0.1 | 0.1 | | -0.1 | 0.5 | 0.3 |
| Decrease in cash and cash equivalents | -9.9 | | | -10.0 | | | | |