| In millions, except per share items | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K |
| Net income | -1.0 | -0.5 | -0.5 | -0.7 |
| Depreciation and amortization [+] | 0.5 | 0.7 | 0.5 | 0.4 |
| Depreciation | 0.5 | 0.7 | 0.5 | 0.4 |
| Deferred taxes | | 0.1 | | |
| Change in working capital | 0.0 | 0.0 | 0.0 | -0.2 |
| Other | 0.0 | 0.0 | 0.0 | -0.2 |
| Other operating activities | 0.0 | 0.0 | 0.0 | 0.2 |
| Cash from operations | -0.5 | 0.3 | 0.0 | -0.4 |
| |
| Capital expenditures | 0.0 | -0.4 | -1.5 | -0.2 |
| Purchases of property and equipment | 0.0 | -0.4 | -1.5 | -0.2 |
| Purchases of short-term investments, net | 3.0 | 8.5 | -14.6 | 0.2 |
| Purchases of short-term investments | | -1.8 | -22.1 | -4.2 |
| Sales of short-term investments | 3.0 | 10.3 | 7.6 | 4.5 |
| Other cash from investing | -4.5 | -10.0 | 0.8 | -9.3 |
| Cash from investing | -1.5 | -1.9 | -15.3 | -9.3 |
| |
| Issuance of common stock, net | | | 6.2 | |
| Other cash from financing | 0.1 | 1.4 | 5.5 | 8.9 |
| Cash from financing | 0.1 | 1.4 | 11.6 | 8.9 |
| |
| Free cash flow | -0.5 | -0.2 | -1.5 | -0.5 |
| Per share (diluted) | ($0.66) | ($0.20) | ($3.54) | |