| 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 | | | -197.1 | -187.2 | -168.2 | -158.6 | -111.2 | -107.4 |
| |
| Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
| Stock-based compensation | | | 41.9 | 38.1 | 31.7 | 27.6 | 18.7 | 18.8 |
| Depreciation on property and equipment | | | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 |
| Non-cash lease expense | | | 1.4 | 1.4 | 1.3 | 1.3 | 1.2 | |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable | | | -20.5 | -19.8 | -8.7 | | -0.8 | -0.6 |
| Prepaid expenses and other current assets | | | 0.9 | 13.3 | 7.1 | 5.4 | 4.4 | 0.8 |
| Accounts payable | | | -1.2 | 16.9 | 2.4 | -1.0 | -4.9 | 1.3 |
| Accrued expenses | | | 3.9 | 10.6 | 19.2 | 18.9 | 6.2 | 4.5 |
| Net cash used in operating activities | | | -171.9 | -127.3 | -116.9 | -107.8 | -90.7 | -83.3 |
| |
| Cash flows from investing activities | | | | | | | | |
| Purchase of property and equipment | | | -0.3 | -0.3 | -0.2 | -0.2 | -0.2 | -0.2 |
| Net cash used in investing activities | | | -0.3 | -0.3 | -0.2 | -0.2 | -0.2 | -0.2 |
| |
| Cash flows from financing activities | | | | | | | | |
| Proceeds from stock options exercised | | | 0.0 | | | | | |
| Net cash provided by financing activities | | | 200.2 | | | 201.4 | 189.7 | 383.1 |