| In millions, except per share items | Sep-30-22 | Sep-05-22 | Sep-30-21 | Sep-05-21 | Sep-30-20 | Sep-30-19 | Sep-30-18 | Sep-30-17 |
| | 10-K | 8-K | 10-K | 8-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -27.3 | 0.0 | 4.2 | 0.0 | 1.1 | 7.6 | -4.5 | 3.9 |
| Depreciation and amortization | 9.1 | 9.1 | 8.0 | 8.0 | 7.3 | 7.3 | 6.4 | 5.6 |
| Asset impairment charges | | | | | | 0.3 | | 0.4 |
| Stock-based compensation | | 7.1 | | 5.9 | | 5.1 | 4.8 | 3.5 |
| Deferred taxes | | 5.3 | | 1.7 | | -1.1 | -2.3 | 1.0 |
| Change in working capital [+] | 11.0 | -10.8 | 1.1 | -2.4 | 0.8 | -4.1 | 4.1 | 0.5 |
| Inventories | | -5.1 | | -0.8 | | -0.5 | -0.5 | 0.1 |
| Other current assets | | -0.7 | | -2.4 | | -2.1 | -1.6 | -0.6 |
| Accounts payable | | 1.6 | | 0.3 | | -0.8 | 0.2 | 1.1 |
| Accrued expenses | | 0.1 | | 1.4 | | -2.2 | 5.1 | -0.7 |
| Deferred revenues | | -5.7 | | -1.0 | | | | |
| Income taxes | 11.0 | -1.1 | 1.1 | 0.2 | 0.8 | 1.5 | 1.0 | 0.7 |
| Other operating activities | -10.1 | -27.9 | 2.1 | 2.2 | 4.8 | -7.0 | 25.4 | -0.9 |
| Cash from operations | -17.2 | -17.2 | 15.4 | 15.4 | 14.0 | 8.0 | 34.1 | 14.1 |
| |
| Capital expenditures [+] | 3.4 | -3.4 | 5.3 | -5.3 | 3.7 | -5.8 | -8.5 | -6.4 |
| Purchases of property and equipment | 3.4 | -3.4 | 5.3 | -5.3 | 3.7 | -5.8 | -8.5 | -6.4 |
| Sales of property and equipment | | | | | | | 0.2 | 0.0 |
| Acquisitions | | | 39.6 | -39.6 | | | | |
| Sales of short-term investments, net [+] | 9.6 | 9.6 | 66.0 | 20.6 | 114.4 | 16.5 | -9.6 | -9.8 |
| Purchases of short-term investments | | | 22.7 | -22.7 | 59.9 | -45.0 | -81.5 | -73.7 |
| Sales of short-term investments | 9.6 | 9.6 | 43.3 | 43.3 | 54.5 | 61.5 | 72.0 | 63.9 |
| Other cash from investing | -6.7 | | -136.1 | -1.0 | -127.2 | -0.9 | -5.6 | |
| Cash from investing | 6.2 | 6.2 | -25.2 | -25.2 | -9.1 | 9.8 | -23.5 | -16.2 |
| |
| Issuance of common stock, net | 1.2 | 1.2 | 3.1 | 3.1 | 1.6 | 0.7 | 2.1 | -4.3 |
| Financing costs | | | | | | | | -0.1 |
| Other cash from financing | -1.6 | -1.6 | 7.1 | 7.1 | -6.3 | -11.8 | -5.5 | -2.3 |
| Cash from financing | -0.4 | -0.4 | 10.2 | 10.2 | -4.6 | -11.0 | -3.4 | -6.5 |
| |
| Free cash flow | -13.9 | -20.6 | 20.7 | 10.1 | 17.7 | 2.2 | 25.6 | 7.6 |
| Per share (diluted) | ($1.00) | ($1.48) | $1.48 | $0.73 | $1.28 | $0.16 | $1.95 | $0.57 |
| |
| Cash paid for income taxes | 0.4 | | 0.2 | | 0.0 | 0.2 | 0.9 | 2.1 |