| 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 | 8-K | 10-Q | 10-Q | 10-Q | 8-K | 10-Q |
| Net income | 4.0 | 6.5 | 8.4 | 9.7 | 7.5 | 5.6 | 2.7 | 4.6 |
| Depreciation and amortization [+] | 1.4 | 1.4 | | 1.4 | 1.3 | 1.6 | | 0.7 |
| Depreciation | 0.9 | 0.9 | 0.5 | 0.9 | 0.8 | 1.0 | 0.4 | 0.6 |
| Amortization | 0.4 | 0.4 | | 0.5 | 0.5 | 0.5 | | 0.1 |
| Stock-based compensation | 0.2 | 0.2 | | 0.2 | 0.2 | 0.1 | | 0.1 |
| Deferred taxes | -0.6 | -0.1 | | -0.8 | 0.1 | 0.0 | | -0.3 |
| Change in working capital | -1.7 | 3.7 | | -1.4 | 1.2 | -4.7 | | -0.2 |
| Other | -1.7 | 3.7 | | -1.4 | 1.2 | -4.7 | | -0.2 |
| Other operating activities | -3.8 | -0.3 | | -2.0 | 7.6 | 22.6 | | 0.2 |
| Cash from operations | -0.6 | 11.2 | | 7.0 | 17.9 | 25.2 | | 5.0 |
| |
| Capital expenditures | -1.1 | -0.6 | | -0.6 | -0.7 | -1.0 | | -2.1 |
| Purchases of property and equipment | -1.1 | -0.6 | | -0.6 | -0.7 | -1.0 | | -2.1 |
| Sales of short-term investments, net [+] | 14.6 | 13.2 | | 20.9 | 18.1 | 18.3 | | 8.1 |
| Purchases of short-term investments | 0.0 | 0.0 | | 0.0 | 0.0 | 0.0 | | 0.0 |
| Sales of short-term investments | 14.6 | 13.2 | | 20.9 | 18.1 | 18.3 | | 8.1 |
| Other cash from investing | -90.0 | -115.7 | | -266.0 | -146.8 | -91.0 | | -74.1 |
| Cash from investing | -76.5 | -103.1 | | -245.6 | -129.5 | -73.7 | | -68.0 |
| |
| Cash dividends paid | -2.4 | -2.4 | | -2.4 | -2.4 | -2.4 | | -1.4 |
| Other cash from financing | 87.6 | 76.5 | | 1.3 | -53.9 | 38.2 | | 138.1 |
| Cash from financing | 85.2 | 74.1 | | -1.1 | -56.3 | 35.9 | | 136.7 |
| |
| Free cash flow | -1.7 | 10.6 | | 6.5 | 17.1 | 24.2 | | 3.0 |
| Per share (diluted) | ($0.09) | $0.53 | | $0.33 | $0.86 | $1.22 | | $0.25 |
| |
| Cash paid for interest | 9.1 | 12.7 | | 3.6 | 1.8 | 2.3 | | 1.6 |