| 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 | 9.8 | 9.2 | 9.6 | -4.8 | 8.9 | 8.4 | 6.7 | 7.2 |
| Depreciation and amortization [+] | 1.1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.3 | 1.3 |
| Depreciation | 0.8 | 0.8 | 0.8 | 0.9 | 0.9 | 0.9 | 1.0 | 1.0 |
| Amortization | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Stock-based compensation | 0.5 | 0.6 | 0.5 | 0.7 | 0.5 | 0.3 | 0.5 | 0.5 |
| Deferred taxes | -0.4 | 1.3 | 1.9 | -4.0 | -0.1 | 1.6 | 1.2 | 2.1 |
| Change in working capital | 5.1 | -11.2 | -14.6 | 10.2 | 7.2 | -4.5 | 1.2 | -1.8 |
| Other | 5.1 | -11.2 | -14.6 | 10.2 | 7.2 | -4.5 | 1.2 | -1.8 |
| Other operating activities | 0.0 | 4.6 | -0.1 | 9.2 | 1.0 | -0.4 | -0.3 | 1.0 |
| Cash from operations | 16.2 | 5.4 | -1.6 | 12.5 | 18.6 | 6.6 | 10.6 | 10.4 |
| |
| Capital expenditures | -1.3 | -0.2 | -0.1 | -0.3 | -0.2 | -0.2 | -0.4 | -0.3 |
| Purchases of property and equipment | -1.3 | -0.2 | -0.1 | -0.3 | -0.2 | -0.2 | -0.4 | -0.3 |
| Purchases of short-term investments, net | 8.1 | 1.6 | -6.0 | -9.1 | -2.6 | -82.3 | -29.6 | 2.6 |
| Purchases of short-term investments | | -9.5 | -41.9 | -18.1 | -26.6 | -94.9 | -38.1 | -80.1 |
| Sales of short-term investments | 8.1 | 11.1 | 35.9 | 9.0 | 23.9 | 12.6 | 8.6 | 82.6 |
| Other cash from investing | -43.5 | -58.0 | -67.4 | -69.9 | -38.3 | 5.6 | -38.8 | 8.8 |
| Cash from investing | -36.7 | -56.6 | -73.5 | -79.4 | -41.2 | -77.0 | -68.8 | 11.0 |
| |
| Cash dividends paid | -2.1 | -2.1 | -2.0 | -2.0 | -2.1 | -2.1 | -2.1 | -2.1 |
| Repurchase of common stock, net | -1.4 | -1.2 | -0.1 | | -9.9 | -4.2 | -0.8 | -1.1 |
| Option exercises | | 0.1 | | 0.1 | | 0.1 | | 0.1 |
| Other cash from financing | 2.0 | 92.1 | 71.1 | 24.1 | -67.8 | 82.2 | -41.6 | -43.5 |
| Cash from financing | -1.6 | 88.7 | 68.9 | 21.9 | -79.8 | 75.8 | -44.5 | -46.8 |
| |
| Free cash flow | 15.0 | 5.2 | -1.7 | 12.1 | 18.4 | 6.4 | 10.2 | 10.0 |
| Per share (diluted) | $1.44 | $0.49 | ($0.15) | $1.17 | $1.71 | $0.58 | $0.92 | $0.90 |
| |
| Cash paid for interest | 10.9 | 7.0 | 4.8 | 1.5 | 1.7 | 0.7 | 1.8 | 1.1 |