| In millions, except per share items | Dec-31-17 | Dec-31-16 | Dec-31-15 | Dec-31-14 | Dec-31-13 | Dec-31-12 | Dec-31-11 | Dec-31-10 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -12.3 | -3.7 | -2.6 | -7.3 | -4.3 | -9.0 | -4.4 | -19.7 |
| Depreciation and amortization | 1.4 | 1.9 | 0.8 | 0.6 | 0.4 | 0.2 | 0.1 | 0.1 |
| Asset impairment charges | 8.4 | | | | | | 0.5 | 11.3 |
| Stock-based compensation | 0.5 | 0.5 | 3.0 | 1.5 | 2.1 | 3.6 | 2.2 | 2.4 |
| Deferred taxes | | | -2.4 | | | | | |
| Change in working capital [+] | -4.0 | -0.5 | 2.8 | -2.4 | 1.7 | 2.1 | 3.2 | 0.9 |
| Accounts receivable | 0.2 | 0.0 | -0.1 | 0.0 | 0.0 | -0.2 | 0.2 | -0.3 |
| Inventories | -1.8 | -1.8 | -3.7 | | | 0.0 | 0.1 | 0.7 |
| Other current assets | 0.0 | 0.2 | 0.7 | 0.0 | 0.0 | 0.0 | 0.2 | 0.5 |
| Accounts payable | -2.5 | 1.8 | 0.7 | -0.1 | 0.2 | -0.2 | 0.1 | 0.0 |
| Accrued expenses | 0.2 | 0.2 | -0.2 | 0.0 | -0.2 | 0.0 | 0.2 | 0.1 |
| Deferred revenues | 0.0 | -0.4 | 0.5 | 0.2 | 0.1 | 0.0 | -0.4 | -1.2 |
| Other | -0.1 | -0.4 | 4.9 | -2.5 | 1.7 | 2.6 | 2.8 | 1.0 |
| Other operating activities | 1.1 | 1.4 | -4.9 | 4.1 | -1.8 | 0.0 | -4.1 | 1.8 |
| Cash from operations | -4.8 | -0.4 | -3.3 | -3.5 | -1.8 | -3.3 | -2.6 | -3.2 |
| |
| Capital expenditures [+] | 0.0 | -0.1 | 0.0 | -0.7 | 0.0 | -0.3 | 0.0 | -0.2 |
| Purchases of property and equipment | 0.0 | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | -0.2 |
| Capitalized product costs | | | | -0.7 | | -0.2 | | |
| Purchases of intangible assets | -0.5 | -0.6 | -0.6 | -0.7 | -0.5 | | -0.3 | -0.1 |
| Acquisitions | | | -2.4 | | | | | |
| Other cash from investing | 0.0 | -0.2 | -0.8 | 0.7 | | | | |
| Cash from investing | -0.5 | -0.9 | -3.8 | -0.7 | -0.5 | -0.3 | -0.3 | -0.3 |
| |
| Issuance of common stock, net | 3.9 | | | 6.4 | | | | 1.2 |
| Financing costs | -0.3 | -0.1 | -0.2 | | 0.0 | | 0.0 | |
| Other cash from financing | -0.3 | 1.8 | 5.5 | -0.4 | 1.2 | 3.3 | 4.0 | 2.9 |
| Cash from financing | 4.0 | 1.9 | 5.8 | 6.1 | 1.2 | 3.3 | 4.0 | 4.0 |
| |
| Free cash flow | -4.8 | -0.5 | -3.4 | -3.5 | -1.8 | -3.3 | -2.6 | -3.4 |
| Per share (diluted) | ($0.23) | ($0.03) | ($0.35) | ($0.65) | ($0.40) | ($1.97) | ($0.53) | ($0.02) |
| |
| Cash paid for interest | 1.1 | 1.0 | 0.1 | | | | | |