| 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 | -4.5 | 9.8 | 6.3 | 3.3 | -3.9 | -1.8 | -0.6 | 5.8 |
| Depreciation and amortization | 1.6 | 1.7 | 2.0 | 2.1 | 2.1 | 1.9 | 1.9 | 1.8 |
| Asset impairment charges | 0.5 | 0.6 | 0.5 | 1.0 | 0.7 | 0.7 | 0.3 | 0.5 |
| Stock-based compensation | 0.3 | 0.3 | 0.3 | 0.7 | 1.1 | 0.5 | 0.7 | 0.6 |
| Tax benefit from stock-based compensation | | | | | | | 0.0 | 0.1 |
| Deferred taxes | 1.2 | -1.7 | -0.3 | 1.1 | 1.2 | 2.1 | -1.3 | 0.1 |
| Change in working capital [+] | -3.2 | -1.0 | -5.1 | -2.6 | -4.5 | 5.6 | -4.0 | -4.0 |
| Restricted cash | | | | | | | 0.0 | 0.0 |
| Accounts receivable | -0.1 | -0.2 | 0.6 | -0.9 | -0.4 | -0.3 | -0.5 | -0.3 |
| Inventories | -3.2 | 0.2 | -2.7 | 2.1 | -4.1 | 2.4 | -3.2 | 0.6 |
| Other current assets | 1.3 | 0.1 | -0.7 | 1.7 | 0.4 | 1.5 | -0.1 | 0.5 |
| Accounts payable | 0.4 | -0.8 | 1.3 | -3.2 | 0.7 | 0.7 | 2.6 | -1.6 |
| Accrued expenses | -3.6 | -1.7 | -2.4 | -1.6 | -0.1 | -0.3 | -1.1 | -0.4 |
| Deferred revenues | 0.2 | -0.6 | 1.1 | -0.9 | -3.3 | 0.2 | -0.5 | -2.1 |
| Income taxes | 1.1 | 0.8 | -0.8 | -0.5 | 0.3 | 1.2 | 0.2 | -1.8 |
| Other | 0.7 | 1.2 | -1.4 | 0.8 | 2.0 | 0.1 | -1.4 | 1.0 |
| Other operating activities | 1.4 | 1.1 | 2.3 | -0.7 | 3.1 | 1.3 | 2.9 | -0.5 |
| Cash from operations | -2.6 | 10.8 | 6.0 | 4.9 | -0.2 | 10.3 | 0.0 | 4.4 |
| |
| Capital expenditures [+] | -0.8 | -0.7 | -0.6 | -1.0 | -2.0 | -0.9 | -2.3 | -2.0 |
| Purchases of property and equipment | -1.1 | -0.7 | -0.9 | -1.2 | -2.3 | -1.3 | -2.3 | -2.0 |
| Capitalized product costs | 0.3 | | 0.3 | 0.2 | 0.3 | 0.4 | | |
| Sales of property and equipment | | | 0.0 | | 0.1 | 0.0 | 0.0 | |
| Other cash from investing | -0.3 | | -0.3 | -0.2 | -0.3 | -0.4 | | |
| Cash from investing | -1.1 | -0.7 | -0.9 | -1.2 | -2.3 | -1.3 | -2.3 | -2.0 |
| |
| Cash dividends paid | -1.5 | -4.3 | -3.4 | -1.2 | -3.1 | -1.4 | -0.7 | |
| Repurchase of common stock, net | -2.0 | -5.1 | -5.9 | -0.3 | -7.5 | -0.2 | -0.3 | |
| Option exercises | | 0.5 | | | 0.1 | 0.1 | 0.0 | 0.0 |
| Other cash from financing | -0.8 | 0.7 | -0.6 | -1.2 | -1.3 | -1.4 | -1.5 | 0.2 |
| Cash from financing | -4.3 | -9.3 | -9.9 | -2.7 | -12.1 | -3.1 | -2.5 | 0.1 |
| |
| Free cash flow | -3.7 | 10.1 | 5.1 | 3.7 | -2.6 | 9.0 | -2.3 | 2.4 |
| Per share (diluted) | ($1.76) | $4.84 | $2.38 | $1.60 | ($0.89) | $3.47 | ($0.86) | $0.88 |
| |
| Cash paid for income taxes | 0.7 | 0.1 | 1.0 | 1.0 | 0.8 | 1.7 | 1.8 | 4.7 |