| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | -29.5 | -28.0 | -27.0 | -26.6 | -26.7 | -19.1 | -18.5 | -21.0 |
| Depreciation and amortization | 0.6 | 0.6 | 0.5 | | 0.4 | 0.3 | 0.3 | 0.3 |
| Stock-based compensation | 3.6 | 3.1 | 3.1 | | 2.9 | 3.0 | 1.6 | 1.9 |
| Change in working capital [+] | 5.7 | -2.2 | 1.6 | | 3.1 | -5.3 | -2.0 | -29.3 |
| Accounts receivable | 0.8 | -1.3 | 0.2 | | -0.2 | 0.8 | -0.6 | -0.4 |
| Other current assets | 0.5 | 1.8 | 0.6 | | 0.9 | -1.3 | -1.3 | -2.8 |
| Accounts payable | 0.5 | 1.5 | -0.2 | | -1.6 | -1.9 | 0.3 | 0.8 |
| Accrued expenses | 3.7 | -4.1 | 1.0 | | 3.9 | -2.8 | -0.6 | 4.9 |
| Income taxes | 0.2 | | | | | | | |
| Other | | | -0.1 | | 0.0 | 0.0 | 0.2 | -31.8 |
| Other operating activities | 4.4 | -1.5 | -3.3 | 26.6 | -1.6 | -0.6 | -2.8 | 33.1 |
| Cash from operations | -15.2 | -27.9 | -25.0 | 0.0 | -21.9 | -21.7 | -21.4 | -15.0 |
| |
| Capital expenditures | -2.6 | -2.0 | -1.8 | 0.0 | -2.6 | -0.7 | -0.7 | -1.9 |
| Purchases of property and equipment | -2.6 | -2.0 | -1.8 | | -2.6 | -0.7 | -0.7 | -1.9 |
| Purchases of intangible assets | | | 0.3 | | | | 1.0 | -1.0 |
| Purchases of short-term investments, net | 13.6 | 22.7 | 3.2 | | -11.4 | -71.4 | -173.3 | |
| Purchases of short-term investments | -58.7 | -75.9 | -86.5 | | -71.1 | -110.7 | -173.3 | |
| Sales of short-term investments | 72.4 | 98.7 | 89.7 | | 59.7 | 39.3 | | |
| Other cash from investing | | | -0.6 | | | | -1.0 | 1.0 |
| Cash from investing | 11.1 | 20.7 | 1.2 | 0.0 | -14.0 | -72.1 | -174.0 | -1.9 |
| |
| Issuance of common stock, net | 17.3 | 1.1 | | | | | | 321.0 |
| Other cash from financing | 0.2 | 0.5 | 0.1 | | 0.4 | 1.0 | 0.5 | 1.7 |
| Cash from financing | 17.6 | 1.6 | 0.1 | 0.0 | 0.4 | 1.0 | 0.5 | 322.7 |
| |
| Free cash flow | -17.7 | -30.0 | -26.8 | 0.0 | -24.5 | -22.4 | -22.1 | -16.9 |
| Per share (diluted) | ($0.29) | ($0.49) | ($0.44) | $0.00 | ($0.40) | ($0.37) | ($0.70) | ($0.37) |
| |
| Cash paid for income taxes | | | | | | | | 0.0 |