| In millions, except per share items | Jun-30-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Cash flows from operating activities | | | | | | | | |
| Net loss | -73.9 | -63.2 | -40.4 | -47.2 | -41.4 | -68.2 | -30.5 | -28.2 |
| |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Stock-based compensation | 10.7 | | 7.7 | 11.9 | 10.2 | 12.2 | 3.9 | 5.5 |
| Depreciation on property and equipment | 0.1 | | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.0 |
| Non-cash lease expense | 0.3 | | 0.3 | 0.3 | 0.3 | 0.6 | 0.3 | 0.2 |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable | -0.1 | | -0.9 | -11.6 | -7.9 | | -0.2 | -0.6 |
| Prepaid expenses and other current assets | 8.3 | | -9.2 | 5.9 | 0.1 | 4.0 | 3.2 | -0.3 |
| Accounts payable | 25.0 | | -17.5 | 14.9 | -0.4 | 1.8 | 0.7 | 0.3 |
| Accrued expenses | -17.3 | | -5.5 | -6.7 | 8.3 | 7.9 | 1.2 | 1.9 |
| Operating lease liabilities | -0.3 | | -0.3 | -1.2 | -0.7 | | -0.4 | -0.8 |
| Net cash used in operating activities | -47.4 | -63.2 | -65.8 | -33.0 | -31.9 | -41.3 | -21.2 | -22.5 |
| |
| Cash flows from investing activities | | | | | | | | |
| Purchase of property and equipment | 0.0 | | 0.0 | -0.1 | -0.1 | -0.1 | 0.0 | -0.1 |
| Net cash used in investing activities | 0.0 | | 0.0 | -0.1 | -0.1 | -0.1 | 0.0 | -0.1 |
| |
| Cash flows from financing activities | | | | | | | | |
| Proceeds from stock options exercised | 0.9 | | 0.0 | | | | | |
| Net cash provided by financing activities | 0.9 | | 0.0 | | | 200.1 | 0.1 | 0.8 |
| Effect of exchange rate changes on cash and cash equivalents | 0.0 | | -0.8 | | 0.0 | | | |
| Net change in cash and cash equivalents | -46.6 | | -66.6 | | 126.9 | | | |