| In millions, except per share items | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net income | 18.0 | 13.6 | 6.3 | 10.7 | 74.9 | 7.1 | 2.7 | 7.8 |
| Depreciation and amortization | | 1.9 | 1.8 | 1.9 | 2.3 | 2.3 | 2.4 | 2.5 |
| Asset impairment charges | | 0.4 | 0.2 | 0.0 | 0.0 | 0.0 | 0.1 | 0.5 |
| Stock-based compensation | | 2.9 | 3.5 | 3.6 | 4.0 | 2.5 | 4.4 | 2.9 |
| Deferred taxes | | | | 65.4 | -65.4 | | | |
| Change in working capital [+] | | -12.7 | 4.3 | -76.5 | 5.0 | 2.3 | -11.9 | -7.1 |
| Accounts receivable | | -18.1 | 12.5 | -14.8 | 3.5 | 1.2 | -0.3 | -8.4 |
| Inventories | | -1.5 | 1.4 | -3.3 | -0.1 | 0.4 | 1.1 | 1.4 |
| Other current assets | | -0.6 | -1.6 | -4.0 | 3.1 | -1.1 | -0.1 | -2.6 |
| Accounts payable | | 0.6 | -1.9 | 3.1 | -1.9 | 1.3 | -0.5 | -2.4 |
| Accrued expenses | | 6.9 | -6.3 | 5.7 | 0.3 | 0.5 | -12.1 | 8.2 |
| Other | | | | -63.2 | | | | -3.3 |
| Other operating activities | | 2.8 | -0.2 | 3.8 | 1.1 | 2.9 | 4.6 | 10.0 |
| Cash from operations | | 8.8 | 15.9 | 8.9 | 21.8 | 17.2 | 2.3 | 16.8 |
| |
| Capital expenditures | | -1.9 | -3.1 | -1.8 | -0.9 | -1.7 | -0.8 | -1.0 |
| Purchases of property and equipment | | -1.9 | -3.1 | -1.8 | -0.9 | -1.7 | -0.8 | -1.0 |
| Purchases of short-term investments, net | | 14.0 | 8.1 | -4.9 | -3.3 | -13.9 | -10.8 | 0.9 |
| Purchases of short-term investments | | -8.0 | -13.6 | -23.8 | -28.6 | -39.9 | -36.2 | -18.3 |
| Sales of short-term investments | | 22.0 | 21.7 | 18.9 | 25.3 | 26.0 | 25.4 | 19.1 |
| Cash from investing | | 12.1 | 5.0 | -6.7 | -4.3 | -15.6 | -11.5 | -0.2 |
| |
| Cash dividends paid | | -3.8 | -3.9 | -3.9 | | | | |
| Repurchase of common stock, net | | -3.4 | -28.3 | -7.1 | | -11.1 | -0.1 | -19.2 |
| Option exercises | | 2.8 | 0.2 | 2.0 | 0.2 | 1.8 | 1.8 | 2.8 |
| Other cash from financing | | 5.6 | 0.3 | 4.0 | 0.3 | 3.6 | 3.5 | 5.6 |
| Cash from financing | | -4.4 | -32.0 | -8.9 | 0.2 | -9.3 | 1.7 | -16.4 |
| |
| Free cash flow | | 6.9 | 12.8 | 7.1 | 20.8 | 15.5 | 1.5 | 15.8 |
| Per share (diluted) | | $0.09 | $0.16 | $0.09 | $0.26 | $0.20 | $0.02 | $0.20 |
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