| In millions, except per share items | Dec-31-22 | Dec-31-21 | Dec-31-20 | Dec-31-19 | Dec-31-18 |
| | 10-K | 10-K | 10-K | 10-K | S-1/A |
| Net income | 1.1 | 1.4 | 1.7 | 0.1 | -0.2 |
| Depreciation and amortization [+] | 1.0 | 1.1 | 1.1 | 1.1 | |
| Depreciation | 0.9 | 1.0 | 1.1 | 1.1 | |
| Amortization of intangible assets | 0.1 | 0.1 | 0.1 | 0.1 | |
| Asset impairment charges | | 0.3 | 0.0 | | |
| Stock-based compensation | 0.1 | | 0.1 | 0.1 | |
| Deferred taxes | 0.2 | 0.2 | 0.7 | -0.2 | |
| Change in working capital | -0.1 | -0.1 | 0.0 | -0.2 | |
| Other | -0.1 | -0.1 | 0.0 | -0.2 | |
| Other operating activities | 0.6 | 0.5 | -2.6 | 0.4 | 1.2 |
| Cash from operations | 2.9 | 3.4 | 1.0 | 1.4 | 0.9 |
| |
| Capital expenditures [+] | -0.5 | -0.4 | -0.2 | -0.8 | 0.0 |
| Purchases of property and equipment | -0.5 | -0.4 | -0.2 | -0.8 | |
| Sales of property and equipment | | 0.6 | | 0.1 | |
| Purchases of short-term investments, net | -1.4 | -20.0 | 16.3 | -9.5 | |
| Purchases of short-term investments | -3.7 | -27.1 | -6.9 | -20.1 | |
| Sales of short-term investments | 2.2 | 7.1 | 23.2 | 10.6 | |
| Other cash from investing | -26.5 | 7.2 | -26.5 | -15.6 | 1.6 |
| Cash from investing | -28.4 | -12.7 | -10.4 | -25.8 | 1.6 |
| |
| Repurchase of common stock, net | -1.9 | | 0.0 | 0.0 | 0.0 |
| Other cash from financing | 14.4 | 3.4 | 22.8 | 28.8 | -2.3 |
| Cash from financing | 12.5 | 3.4 | 22.8 | 28.7 | -2.3 |
| |
| Free cash flow | 2.5 | 3.0 | 0.8 | 0.6 | 0.9 |
| Per share (diluted) | $1.08 | $1.27 | $0.31 | $0.23 | $0.40 |
| |
| Cash paid for interest | 1.8 | 1.7 | 3.0 | 3.2 | |