| In millions, except per share items | Jun-30-23 | Dec-05-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Dec-05-21 | Sep-30-21 |
| | 10-Q | 8-K | 10-Q | 10-Q | 10-Q | 10-K | 8-K | 10-Q |
| Net income | 3.6 | 3.8 | 3.7 | 3.2 | 2.7 | 2.3 | 2.3 | 2.9 |
| Depreciation and amortization [+] | | | | | | 0.8 | | 0.0 |
| Depreciation | | | | | | 0.9 | | 0.0 |
| Amortization | | | | | | 0.0 | | 0.0 |
| Change in working capital | | | 0.3 | -5.0 | 2.4 | -2.2 | | -0.3 |
| Other | | | 0.3 | -5.0 | 2.4 | -2.2 | | -0.3 |
| Other operating activities | -3.4 | | 0.0 | 5.8 | -4.2 | 4.9 | | 0.9 |
| Cash from operations | 0.2 | | 4.0 | 4.0 | 0.9 | 5.9 | | 3.5 |
| |
| Capital expenditures | 0.0 | | 0.0 | 0.1 | -0.1 | 3.7 | | -0.5 |
| Purchases of property and equipment | | | 0.0 | 0.1 | -0.1 | 3.7 | | -0.5 |
| Purchases of short-term investments, net | | | 1.4 | 64.8 | -13.1 | 95.6 | | 8.6 |
| Purchases of short-term investments | | | -7.0 | 54.8 | -22.9 | 81.5 | | -1.3 |
| Sales of short-term investments | | | 8.4 | 10.1 | 9.7 | 14.1 | | 9.8 |
| Other cash from investing | | | -36.4 | -86.5 | -95.6 | -175.6 | | -20.6 |
| Cash from investing | 0.0 | | -35.0 | -21.6 | -108.8 | -76.3 | | -12.6 |
| |
| Cash dividends paid | | | -0.9 | 1.7 | | 5.0 | | -0.8 |
| Repurchase of common stock, net | | | -0.4 | | | -0.3 | | -0.3 |
| Other cash from financing | | | 36.4 | -10.9 | -5.5 | 25.8 | | -18.5 |
| Cash from financing | 0.0 | | 35.1 | -9.3 | -5.5 | 30.5 | | -19.6 |
| |
| Free cash flow | 0.2 | | 4.0 | 4.1 | 0.8 | 9.6 | | 3.0 |
| Per share (diluted) | $0.09 | | $1.47 | $1.50 | $0.29 | $3.51 | | $1.08 |
| |
| Cash paid for interest | | | 0.6 | 0.4 | 0.4 | 0.4 | | 0.5 |
| Cash paid for income taxes | | | 0.7 | 1.1 | | 0.7 | | 0.4 |