| In millions, except per share items | Mar-31-23 | Mar-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 | 10-K | 10-K |
| Net income | -43.1 | -6.9 | -2.3 | 1.0 | -5.3 | -1.8 | -2.6 | -2.2 |
| Depreciation and amortization [+] | 6.2 | 6.2 | 0.0 | | | 0.0 | 0.0 | 0.0 |
| Depreciation | 6.2 | 6.2 | 0.0 | | | | | |
| Amortization of intangible assets | | | | | | 0.0 | 0.0 | 0.0 |
| Asset impairment charges | 8.0 | | | | | | | |
| Stock-based compensation | 3.2 | 0.1 | 0.9 | 0.2 | | 1.0 | 1.0 | 0.7 |
| Change in working capital [+] | 5.3 | 1.2 | -0.1 | 0.3 | 0.7 | -0.1 | 0.3 | 0.2 |
| Accounts receivable | -0.1 | 0.2 | | | | | | |
| Inventories | 0.1 | 0.0 | | | | | | |
| Other current assets | -0.7 | 0.0 | 0.0 | 0.0 | | | | |
| Other | 6.0 | 1.0 | -0.1 | 0.3 | 0.7 | -0.1 | 0.3 | 0.2 |
| Other operating activities | 12.8 | -1.1 | 0.9 | -1.7 | 5.3 | 0.0 | 0.1 | 0.1 |
| Cash from operations | -7.6 | -0.5 | -0.5 | -0.2 | 0.7 | -0.9 | -1.2 | -1.2 |
| |
| Capital expenditures [+] | -1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Purchases of property and equipment | -1.0 | 0.0 | 0.0 | | | | | |
| Sales of property and equipment | | 0.0 | | | | | | |
| Other cash from investing | -3.1 | 0.6 | 0.8 | 0.2 | 0.0 | 0.3 | | |
| Cash from investing | -4.1 | 0.6 | 0.8 | 0.2 | 0.0 | 0.3 | 0.0 | 0.0 |
| |
| Issuance of common stock, net | | | | | | | 0.8 | 1.1 |
| Other cash from financing | 12.4 | -0.1 | 0.0 | 0.0 | 2.1 | 0.6 | 0.1 | 0.5 |
| Cash from financing | 12.4 | -0.1 | 0.0 | 0.0 | 2.1 | 0.6 | 0.9 | 1.5 |
| |
| Free cash flow | -8.6 | -0.5 | -0.5 | -0.2 | 0.7 | -0.9 | -1.2 | -1.2 |
| Per share (diluted) | ($0.97) | | ($0.07) | ($0.03) | $0.12 | ($0.02) | ($0.02) | ($0.03) |
| |
| Cash paid for interest | 0.0 | | 0.0 | | 0.8 | | | |
| Cash paid for income taxes | | | | | 0.0 | | | |