| 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 | 0.0 | 0.0 | 29.6 | 0.0 | 0.0 | 0.0 | 23.2 | 0.0 |
| Depreciation and amortization | 0.3 | 0.3 | 0.3 | 0.4 | 0.3 | 0.4 | 0.3 | 0.3 |
| Stock-based compensation | 0.6 | 0.5 | 0.3 | 0.1 | 0.7 | 0.3 | 0.1 | 0.3 |
| Deferred taxes | -0.1 | -0.2 | -1.2 | 0.2 | 1.0 | -1.5 | 0.3 | 0.8 |
| Other operating activities | 5.8 | 13.0 | -19.3 | 4.4 | 10.7 | 13.0 | -16.8 | 4.3 |
| Cash from operations | 6.6 | 13.6 | 9.8 | 5.0 | 12.8 | 12.2 | 7.0 | 5.7 |
| |
| Capital expenditures [+] | -2.0 | -0.2 | 0.0 | 0.0 | -0.2 | -0.1 | -0.3 | -0.1 |
| Purchases of property and equipment | -2.0 | -0.2 | 0.0 | 0.0 | -0.2 | -0.1 | -0.3 | -0.1 |
| Sales of property and equipment | | | | 0.2 | 0.2 | 2.9 | 0.0 | 0.0 |
| Purchases of short-term investments, net | 3.6 | 4.8 | 5.4 | 18.0 | 12.6 | -106.0 | | |
| Purchases of short-term investments | | | | | -2.0 | -131.1 | | |
| Sales of short-term investments | 3.6 | 4.8 | 5.4 | 18.0 | 14.6 | 25.0 | | |
| Other cash from investing | -4.3 | -10.8 | -44.0 | -89.4 | -98.3 | -44.2 | 37.7 | 3.8 |
| Cash from investing | -2.7 | -6.2 | -38.7 | -71.1 | -85.6 | -147.4 | 37.3 | 3.7 |
| |
| Cash dividends paid | -1.5 | -1.5 | -1.1 | -1.1 | -1.1 | -1.1 | -1.0 | -1.0 |
| Repurchase of common stock, net | 0.0 | -0.1 | | | 0.1 | -0.1 | | |
| Option exercises | 0.2 | | | | | | | |
| Other cash from financing | 16.9 | 62.5 | -8.2 | 91.0 | 63.0 | 65.8 | -44.2 | 9.6 |
| Cash from financing | 15.2 | 60.9 | -9.2 | 89.9 | 62.0 | 64.6 | -45.2 | 8.6 |
| |
| Free cash flow | 4.6 | 13.4 | 9.8 | 5.0 | 12.6 | 12.1 | 6.6 | 5.6 |
| Per share (diluted) | $0.49 | $1.44 | $1.06 | $0.54 | $1.37 | $1.32 | $0.73 | $0.62 |
| |
| Cash paid for interest | 9.1 | 7.1 | 4.9 | 2.6 | 0.9 | 0.7 | 0.7 | 0.7 |
| Cash paid for income taxes | 7.0 | 0.0 | 3.1 | 4.9 | 1.9 | | 1.4 | 4.2 |