| In millions, except per share items | Dec-31-21 | Dec-31-20 |
| | 10-K | 10-K |
| Operating activities | | |
| Net loss | -87.5 | -53.0 |
| |
| Adjustments to reconcile net loss to cash used in operating activities: | | |
| Stock-based compensation expense | 28.4 | 15.2 |
| Depreciation and amortization | 2.6 | 2.8 |
| Change in fair value of warrant liabilities | 7.0 | |
| Change in fair value contingent consideration | 1.9 | |
| Amortization of premium (accretion of discount) on available-for-sale securities, net | 0.4 | -0.1 |
| Provision (recovery) for expected credit losses | 0.0 | 0.1 |
| Other | 0.0 | 0.0 |
| Changes in operating assets and liabilities: | | |
| Accounts receivable | 0.4 | -13.3 |
| Inventory | -3.0 | 0.5 |
| Deferred costs of services | 1.0 | -1.2 |
| Prepaid expenses and other current assets | -3.9 | 0.2 |
| Other long-term assets | | 0.2 |
| Accounts payable | 6.5 | 4.0 |
| Deferred revenue | 0.2 | -0.3 |
| Accrued and other liabilities | 4.5 | 1.2 |
| Net cash used in operating activities | -37.0 | -28.3 |
| |
| Investing activities | | |
| Purchases of property and equipment | -6.7 | -1.2 |
| Purchases of available-for-sale securities | -279.9 | -45.7 |
| Net cash (used in) provided by investing activities | -185.4 | -9.5 |
| |
| Financing activities | | |
| Proceeds from exercise of stock options and employee stock purchase plan | 3.9 | 1.1 |
| Net cash provided by financing activities | 497.5 | 188.8 |
| Effect of exchange rates on cash, cash equivalents and restricted cash | 0.0 | 0.0 |
| |
| Supplemental disclosure of non-cash investing and financing activities: | | |
| Capital expenditures included in accounts payable | 1.5 | 0.0 |
| Issuance of Common Stock for services | 1.3 | 0.2 |
| Reconciliation of cash, cash equivalents and restricted cash | | |
| Cash and cash equivalents | | |