| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 | Dec-31-17 | Dec-31-16 | Dec-31-15 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 13.5 | 25.9 | 5.2 | 23.8 | 6.2 | 3.0 | 28.9 | -7.4 |
| Depreciation and amortization | 2.6 | 4.1 | 12.1 | 5.0 | 0.0 | | | |
| Stock-based compensation | 0.5 | 1.2 | 0.7 | 0.5 | 0.3 | 0.3 | | 0.6 |
| Deferred taxes | -3.9 | 7.0 | -1.7 | -7.1 | 0.0 | 15.7 | -21.6 | 3.3 |
| Change in working capital [+] | -12.5 | -18.9 | -12.0 | -9.5 | -3.0 | -45.9 | -24.3 | -22.1 |
| Accounts receivable | | | | | | -0.6 | -0.1 | -0.1 |
| Other | -12.5 | -18.9 | -12.0 | -9.5 | -3.0 | -45.3 | -24.2 | -22.1 |
| Other operating activities | 8.0 | 15.1 | 15.0 | 5.9 | 16.1 | 46.3 | 26.7 | |
| Cash from operations | 8.2 | 34.3 | 19.3 | 18.5 | 19.6 | 19.5 | 9.6 | 11.2 |
| |
| Capital expenditures | -0.3 | -1.1 | -3.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Purchases of property and equipment | -0.3 | -1.1 | -3.9 | 0.0 | | | | |
| Acquisitions | | | | -19.7 | | | | |
| Sales of short-term investments | | | | 0.2 | 0.2 | 0.3 | | |
| Sales of short-term investments | | | | 0.2 | 0.2 | 0.3 | | |
| Other cash from investing | -43.3 | 26.8 | -31.2 | -7.2 | -28.4 | -12.5 | -21.1 | -18.9 |
| Cash from investing | -43.5 | 25.8 | -35.2 | -26.7 | -28.1 | -12.1 | -21.1 | -18.9 |
| |
| Repurchase of common stock, net | -1.1 | | -2.0 | -0.9 | -1.4 | | | 0.0 |
| Financing costs | | | | | -0.5 | | | |
| Other cash from financing | -0.2 | -20.2 | 9.8 | | -0.9 | -9.0 | -3.7 | -3.8 |
| Cash from financing | -1.4 | -20.2 | 7.7 | -0.9 | -1.8 | -9.0 | -3.7 | -3.8 |
| |
| Free cash flow | 7.9 | 33.2 | 15.3 | 18.5 | 19.6 | 19.5 | 9.6 | 11.2 |
| Per share (diluted) | $0.61 | $2.59 | $1.19 | $1.43 | $1.50 | $1.49 | $0.74 | $0.86 |
| |
| Cash paid for interest | 0.3 | 0.1 | | | | | | |