| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | -8.0 | 7.9 | 15.4 | 4.0 | 10.5 | -1.8 | 5.3 | 19.2 |
| Depreciation and amortization | 3.6 | 2.7 | 3.3 | 2.5 | 2.7 | 2.5 | 3.1 | 2.5 |
| Asset impairment charges | 0.1 | 0.2 | -1.8 | | -0.6 | -0.3 | | |
| Stock-based compensation | 1.3 | 1.1 | 3.4 | | 1.0 | 0.8 | | |
| Deferred taxes | -0.1 | 1.9 | -1.4 | 0.4 | -0.2 | -0.3 | 4.6 | |
| Change in working capital [+] | -6.3 | -16.8 | 14.2 | -0.7 | 0.8 | -8.8 | -16.3 | 0.4 |
| Accounts receivable | 0.6 | -1.0 | 10.2 | | 6.8 | -0.8 | 0.2 | |
| Inventories | 3.7 | 2.4 | -4.6 | | -7.4 | -6.1 | -9.8 | |
| Accounts payable | -6.3 | -6.7 | 4.1 | | 2.7 | 0.2 | -0.1 | |
| Accrued expenses | -4.8 | -10.4 | | | -0.8 | -2.8 | -6.2 | |
| Other | 0.5 | -1.1 | 4.5 | -0.7 | -0.4 | 0.6 | -0.4 | 0.4 |
| Other operating activities | 15.2 | -10.6 | -13.6 | 5.2 | -0.2 | -0.4 | 11.7 | -5.6 |
| Cash from operations | 5.7 | -13.7 | 19.4 | 11.3 | 14.0 | -8.4 | 8.3 | 16.5 |
| |
| Capital expenditures [+] | -3.6 | -5.4 | -24.8 | 4.1 | -4.1 | -1.9 | -13.8 | 3.2 |
| Purchases of property and equipment | -3.6 | -5.4 | -24.8 | 4.1 | -4.1 | -1.9 | -13.8 | 3.2 |
| Sales of property and equipment | | | | | | 2.7 | | |
| Acquisitions | | -3.9 | -1.2 | | | | | |
| Purchases of short-term investments, net | -13.1 | -28.9 | -45.9 | 33.0 | | | | |
| Purchases of short-term investments | -24.5 | -44.4 | -66.8 | 32.8 | | | | |
| Sales of short-term investments | 11.3 | 15.5 | 20.9 | 0.2 | | | | |
| Other cash from investing | 4.6 | 28.4 | 99.4 | -68.0 | 4.3 | 2.8 | 33.2 | 6.1 |
| Cash from investing | -12.2 | -9.9 | 27.5 | -30.8 | 0.2 | 3.7 | 19.4 | 9.3 |
| |
| Repurchase of common stock, net | | | | -1.0 | -0.1 | | -14.5 | -4.6 |
| Financing costs | 0.0 | -0.1 | | | | | | |
| Other cash from financing | -1.6 | 1.4 | -17.8 | 0.8 | -10.8 | 1.2 | -9.2 | -8.4 |
| Cash from financing | -1.6 | 1.5 | -17.8 | -0.1 | -10.9 | 1.2 | -23.7 | -13.0 |
| |
| Free cash flow | 2.1 | -19.1 | -5.4 | 15.4 | 9.9 | -10.2 | -5.5 | 19.7 |
| Per share (diluted) | $0.14 | ($1.33) | ($0.35) | $1.00 | $0.64 | ($0.66) | ($0.31) | $1.15 |
| |
| Cash paid for interest | 0.7 | 0.7 | 0.6 | 0.6 | 0.4 | 0.5 | 1.7 | 0.5 |