| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | S-1/A |
| Net income | 6.9 | 7.5 | 2.1 | 2.4 | 4.1 | 3.9 |
| Depreciation and amortization [+] | | | | 0.3 | 0.3 | 0.4 |
| Depreciation | | | | 0.3 | 0.3 | 0.4 |
| Deferred taxes | | | | -0.1 | -0.1 | 0.7 |
| Change in working capital | 1.9 | -0.2 | 1.3 | 0.0 | 0.2 | |
| Other | 1.9 | -0.2 | 1.3 | 0.0 | 0.2 | |
| Other operating activities | 2.1 | -1.3 | 2.5 | -0.1 | -0.4 | 0.8 |
| Cash from operations | 10.9 | 6.0 | 5.8 | 2.6 | 4.2 | 5.7 |
| |
| Capital expenditures | 0.2 | 1.5 | 1.7 | -0.2 | -0.5 | -0.1 |
| Purchases of property and equipment | 0.2 | 1.5 | 1.7 | -0.2 | -0.5 | -0.1 |
| Sales of short-term investments, net [+] | 104.2 | 72.4 | 25.8 | 20.3 | 7.9 | |
| Purchases of short-term investments | 67.5 | 34.0 | | -2.5 | -3.0 | |
| Sales of short-term investments | 36.7 | 38.4 | 25.8 | 22.8 | 10.9 | |
| Other cash from investing | -315.1 | -38.7 | -49.8 | -18.5 | -29.1 | -38.1 |
| Cash from investing | -210.7 | 35.1 | -22.3 | 1.7 | -21.7 | -38.2 |
| |
| Repurchase of common stock, net | -10.1 | -0.5 | 7.7 | | | |
| Other cash from financing | 121.7 | -15.9 | -38.7 | 99.1 | 19.5 | 13.6 |
| Cash from financing | 111.6 | -16.4 | -31.0 | 99.1 | 19.5 | 13.6 |
| |
| Free cash flow | 11.1 | 7.4 | 7.6 | 2.4 | 3.7 | 5.6 |
| Per share (diluted) | $0.82 | $0.53 | $0.62 | | | |
| |
| Cash paid for interest | 6.9 | 5.9 | 9.7 | 12.0 | 8.8 | |