| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | S-1/A |
| Net income | -129.6 | -79.6 | -58.0 | -54.7 | -84.7 | -31.9 | -19.8 |
| Depreciation and amortization [+] | 8.7 | 7.9 | 4.2 | 2.2 | 2.1 | 0.7 | 0.2 |
| Depreciation | 8.7 | 7.9 | 4.2 | 2.2 | 2.1 | 0.7 | 0.2 |
| Stock-based compensation | 28.6 | 20.8 | 18.4 | 15.9 | 17.9 | 3.0 | 2.8 |
| Change in working capital [+] | 30.6 | 52.0 | -16.3 | 75.7 | 12.6 | 13.2 | 0.8 |
| Other current assets | 0.5 | 2.2 | -2.5 | -0.2 | -0.2 | -0.5 | |
| Accounts payable | 3.7 | 13.3 | 1.6 | 0.0 | -2.1 | 4.7 | 0.5 |
| Accrued expenses | 12.6 | 8.1 | 2.2 | 6.5 | 2.5 | 5.0 | |
| Deferred revenues | -15.9 | -7.5 | -15.6 | 85.7 | | | |
| Other | 29.6 | 35.9 | -2.0 | -16.4 | 12.4 | 3.9 | 0.3 |
| Other operating activities | -11.4 | -11.6 | -12.3 | -19.1 | -6.7 | -3.0 | 1.6 |
| Cash from operations | -73.1 | -10.5 | -64.0 | 20.0 | -58.9 | -18.1 | -14.4 |
| |
| Capital expenditures | -45.0 | -46.4 | -20.9 | -9.0 | -11.3 | -10.5 | -2.6 |
| Purchases of property and equipment | -45.0 | -46.4 | -20.9 | -9.0 | -11.3 | -10.5 | -2.6 |
| Purchases of intangible assets | | | -2.1 | | | | |
| Acquisitions | | | | -0.4 | | | |
| Other cash from investing | | -15.4 | -14.0 | | | | |
| Cash from investing | -45.0 | -61.7 | -37.0 | -9.4 | -11.3 | -10.5 | -2.6 |
| |
| Issuance of common stock, net | 25.0 | | 87.1 | 155.2 | 69.8 | | |
| Option exercises | 0.2 | 1.7 | 0.8 | 0.6 | | 0.0 | |
| Financing costs | 2.3 | | | | | | |
| Other cash from financing | 72.7 | 3.4 | -3.5 | -6.4 | 60.3 | 19.4 | 20.8 |
| Cash from financing | 95.2 | 1.7 | 82.7 | 148.2 | 130.0 | 19.3 | 20.8 |
| |
| Free cash flow | -118.1 | -56.9 | -84.9 | 11.1 | -70.1 | -28.6 | -17.0 |
| Per share (diluted) | ($2.61) | ($1.29) | ($2.25) | $0.33 | ($3.70) | ($3.34) | |
| |
| Cash paid for interest | 0.3 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | |