| 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/A | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -11.6 | -1.7 | 0.2 | -2.6 | -0.2 | -3.6 | 2.7 | 1.0 |
| Depreciation and amortization | 1.4 | 1.4 | 1.3 | 1.2 | 0.9 | 0.9 | 0.9 | 0.9 |
| Asset impairment charges | | | 0.2 | 0.2 | 0.0 | 0.1 | 0.2 | 0.1 |
| Stock-based compensation | 0.3 | 0.3 | | 0.3 | 0.2 | 0.1 | 0.0 | 0.1 |
| Deferred taxes | | 0.2 | | -0.9 | -0.2 | -1.2 | 1.1 | 0.3 |
| Change in working capital [+] | 0.0 | -7.4 | 2.1 | 0.4 | 1.6 | 2.3 | 5.2 | -5.5 |
| Accounts receivable | -2.6 | -1.8 | -2.5 | 1.8 | -0.2 | -2.1 | 0.7 | -0.9 |
| Inventories | -5.2 | -7.1 | 3.9 | -2.2 | 2.9 | -0.5 | 2.1 | -4.2 |
| Other current assets | 0.1 | 0.2 | -0.1 | 0.7 | -1.6 | 0.6 | 1.7 | -1.2 |
| Accounts payable | | | -0.2 | -0.3 | -0.4 | 4.0 | -0.3 | 0.9 |
| Accrued expenses | | | 0.1 | 0.2 | -0.9 | 1.0 | 0.0 | 0.0 |
| Deferred revenues | 0.9 | 0.4 | 0.6 | 0.9 | 1.1 | 0.1 | 0.0 | 0.0 |
| Other | 6.8 | 0.9 | 0.4 | -0.7 | 0.7 | -0.8 | 1.1 | -0.1 |
| Other operating activities | 0.9 | 0.9 | 0.6 | -1.0 | 2.9 | -1.0 | 0.5 | 0.2 |
| Cash from operations | -9.0 | -6.3 | 4.4 | -2.5 | 5.3 | -2.3 | 10.7 | -2.9 |
| |
| Capital expenditures [+] | -1.8 | -2.4 | -0.9 | -2.5 | -1.4 | -0.6 | -1.4 | -1.1 |
| Purchases of property and equipment | -1.8 | -2.4 | -0.9 | -2.5 | -1.4 | -0.6 | -1.4 | -1.1 |
| Sales of property and equipment | | 0.1 | | | | | | |
| Sales of short-term investments, net [+] | | | | | 4.6 | 2.6 | -0.5 | -2.8 |
| Purchases of short-term investments | | | | | -3.7 | | -0.5 | -2.8 |
| Sales of short-term investments | | | | | 8.3 | 2.6 | | |
| Cash from investing | -1.8 | -2.3 | -0.9 | -2.5 | 3.2 | 2.0 | -1.9 | -3.9 |
| |
| Cash dividends paid | -2.0 | -1.2 | -1.0 | -1.0 | -1.1 | -3.0 | -2.5 | |
| Repurchase of common stock, net | | 0.0 | -0.3 | -1.0 | -3.3 | -0.5 | -0.1 | 0.1 |
| Option exercises | | | | | | | 0.4 | |
| Other cash from financing | 4.1 | 13.6 | -0.1 | 0.4 | | | 0.4 | |
| Cash from financing | 2.1 | 12.4 | -1.3 | -1.7 | -4.4 | -3.5 | -2.6 | 0.1 |
| |
| Free cash flow | -10.8 | -8.7 | 3.5 | -4.9 | 3.9 | -2.9 | 9.3 | -4.0 |
| Per share (diluted) | ($635.68) | ($583.50) | $0.28 | ($0.39) | $289.07 | ($0.21) | $0.67 | ($0.29) |
| |
| Cash paid for interest | 0.2 | 0.1 | 0.0 | 0.0 | | | | |