| In millions, except per share items | Dec-31-21 | Dec-31-20 | Dec-31-19 |
| | 10-K | S-1/A | S-1/A |
| Operating Activities | | | |
| Net income (loss) | | 29.2 | 21.3 |
| |
| Adjustments to reconcile net loss to net cash from (used in) operating activities: | | | |
| Depreciation and amortization | | 1.1 | 0.8 |
| Bad debt expense | | 0.8 | 0.3 |
| (Gain) loss from change in fair value of warrant liability | -18.8 | | |
| Changes in operating assets and liabilities: | | | |
| Accounts receivable | | -1.5 | -0.7 |
| Inventory | | -0.9 | 1.3 |
| Other current assets | | -0.7 | -0.6 |
| Accounts payable | 0.3 | -0.9 | 1.2 |
| Deferred revenue | | -0.9 | 0.2 |
| Accrued expenses | 1.8 | -0.5 | 1.2 |
| Net cash provided by (used in) operating activities | -1.4 | 26.4 | 25.4 |
| |
| Investing Activities | | | |
| Net cash used in investing activities | -317.5 | -1.4 | -1.7 |
| |
| Financing Activities | | | |
| |
| Extinguishment of Bank of America term loan | | | |
| Capitalized transaction costs | -0.4 | | |
| Net cash provided by (used in) financing activities | 319.0 | -18.3 | -13.6 |
| |
| Supplemental Disclosure of Cash Flow Information | | | |
| Cash paid for interest | | 2.5 | 1.6 |
| |
| Non-cash investing and financing activities | | | |