| In millions, except per share items | Dec-31-22 | Dec-05-22 | Dec-31-21 | Dec-05-21 | Dec-31-20 | Dec-05-20 | Dec-31-19 | Dec-31-18 |
| | 10-K | 8-K | 10-K | 8-K | 10-K | 8-K | 10-K | 10-K |
| Net income | 0.0 | 0.6 | 0.0 | 0.7 | 0.0 | -6.8 | -11.1 | -6.9 |
| Depreciation and amortization | 6.7 | 6.7 | 5.4 | 5.4 | 4.2 | 4.2 | 2.9 | 2.0 |
| Asset impairment charges | 0.2 | 0.2 | 0.0 | 0.0 | 0.3 | 0.3 | 0.0 | 0.1 |
| Stock-based compensation | 5.5 | 5.5 | 6.6 | 6.6 | 8.1 | 8.1 | 9.9 | 0.7 |
| Deferred taxes | 0.1 | 0.1 | 0.2 | 0.2 | | | | |
| Change in working capital [+] | -1.5 | -0.2 | -0.3 | -1.8 | 2.3 | 0.3 | 1.7 | -14.6 |
| Accounts receivable | -2.0 | -2.0 | -0.6 | -0.6 | -0.1 | -0.1 | -1.9 | -0.9 |
| Other current assets | -0.2 | -0.2 | 0.0 | 0.0 | 0.1 | 0.1 | 0.2 | -0.4 |
| Accounts payable | 0.6 | 0.6 | -0.5 | -0.5 | -0.1 | -0.1 | -0.1 | -0.3 |
| Accrued expenses | 1.5 | | -1.1 | | -0.1 | | 0.6 | -3.5 |
| Deferred revenues | | -0.2 | | 0.3 | | 0.4 | | |
| Other | -1.5 | 1.5 | 1.9 | -1.1 | 2.5 | -0.1 | 2.8 | -9.5 |
| Other operating activities | 1.5 | -0.4 | -3.0 | -2.1 | -8.4 | 0.5 | -1.8 | 10.7 |
| Cash from operations | 12.5 | 12.5 | 8.9 | 8.9 | 6.5 | 6.5 | 1.6 | -8.1 |
| |
| Capital expenditures [+] | -8.8 | -0.4 | -5.2 | -0.3 | -5.7 | -0.2 | -6.0 | -6.0 |
| Purchases of property and equipment | -0.4 | -0.4 | -0.3 | -0.3 | -0.2 | -0.2 | -0.1 | -0.1 |
| Capitalized product costs | -8.5 | | -5.0 | | -5.5 | | -5.9 | -5.9 |
| Other cash from investing | | -8.5 | | -5.0 | | -5.5 | | |
| Cash from investing | -8.8 | -8.8 | -5.2 | -5.2 | -5.7 | -5.7 | -6.0 | -6.0 |
| |
| Issuance of common stock, net | 5.2 | 5.2 | 24.3 | 3.3 | | 3.1 | 7.4 | |
| Other cash from financing | -11.3 | -11.3 | -6.7 | 14.3 | 0.3 | -2.8 | -1.3 | 23.9 |
| Cash from financing | -6.1 | -6.1 | 17.6 | 17.6 | 0.3 | 0.3 | 6.2 | 23.9 |
| |
| Free cash flow | 12.1 | 12.1 | 8.7 | 8.7 | 6.4 | 6.4 | 1.6 | -8.1 |
| Per share (diluted) | $0.26 | $0.86 | $0.28 | $0.65 | $0.07 | $0.00 | ($0.40) | ($1.37) |
| |
| Cash paid for interest | | | | 0.0 | | 0.0 | | |
| Cash paid for income taxes | 0.0 | 0.0 | | | | | | |