| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 |
| | 10-K | 10-K | 10-K | 10-K/A | 10-K | 10-K |
| Net income | -60.0 | -52.9 | -5.8 | 2.5 | 1.4 | 0.0 |
| Depreciation and amortization | 5.6 | 4.3 | 0.6 | | | |
| Asset impairment charges | 0.4 | | | | | |
| Stock-based compensation | 27.9 | 14.5 | 0.0 | | | |
| Deferred taxes | | -1.7 | | 0.0 | 0.0 | |
| Change in working capital [+] | 7.9 | -7.0 | 8.1 | 0.3 | 0.5 | |
| Accounts receivable | -0.1 | 0.0 | | | | |
| Other current assets | -0.5 | 0.6 | 0.0 | | | |
| Accounts payable | 6.6 | -1.6 | -0.3 | | | |
| Accrued expenses | 0.2 | 2.1 | 0.2 | 0.0 | | |
| Deferred revenues | -0.7 | -6.7 | 7.6 | | | |
| Other | 2.4 | -1.4 | 0.7 | 0.3 | 0.5 | |
| Other operating activities | -13.1 | 19.6 | 1.7 | -4.3 | -2.5 | |
| Cash from operations | -31.3 | -23.2 | 4.7 | -1.5 | -0.6 | 0.0 |
| |
| Capital expenditures | -0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Purchases of property and equipment | -0.1 | 0.0 | 0.0 | | | |
| Purchases of intangible assets | -1.1 | -0.5 | | | | |
| Purchases of short-term investments, net | | | | 0.6 | -205.3 | |
| Purchases of short-term investments | | | | -0.5 | -205.3 | |
| Sales of short-term investments | | | | 1.1 | | |
| Other cash from investing | | -13.4 | | 137.1 | | |
| Cash from investing | -1.3 | -13.9 | 0.0 | 137.7 | -205.3 | 0.0 |
| |
| Issuance of common stock, net | 42.8 | | | -137.1 | 207.7 | |
| Option exercises | | 0.4 | | | | |
| Financing costs | | -1.1 | | | | |
| Other cash from financing | -42.8 | 58.3 | 5.9 | -0.2 | -0.7 | 0.1 |
| Cash from financing | 0.0 | 59.0 | 5.9 | -137.4 | 207.0 | 0.1 |
| |
| Free cash flow | -31.4 | -23.2 | 4.7 | -1.5 | -0.6 | 0.0 |
| Per share (diluted) | ($0.62) | ($0.89) | $0.21 | ($0.21) | ($0.10) | $0.00 |
| |
| Cash paid for interest | 0.5 | 4.4 | | | | |
| Cash paid for income taxes | | 0.0 | | 0.4 | | |