| In millions, except per share items | Mar-31-23 | Mar-05-23 | Jun-30-22 | Mar-31-22 | Mar-05-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 8-K | 10-Q | 10-Q | 8-K | 10-K | 10-Q | 10-Q |
| Net income | | | -22.1 | -18.8 | | -17.1 | -16.2 | -17.2 |
| Depreciation and amortization | | | 0.7 | 0.7 | | 0.7 | 0.9 | 1.0 |
| Asset impairment charges | | | 0.1 | | | 0.2 | 0.1 | 0.1 |
| Stock-based compensation | | | 0.4 | | | 0.6 | 0.7 | 0.8 |
| Change in working capital [+] | | | 6.1 | | | 6.0 | 5.3 | 5.9 |
| Accounts receivable | | | -2.0 | | | -0.7 | -0.7 | -0.6 |
| Inventories | | | -0.4 | | | -0.5 | -0.1 | -0.1 |
| Other current assets | | | 1.1 | | | 1.2 | 0.1 | 0.1 |
| Accounts payable | | | 0.4 | | | 0.0 | 0.3 | 0.6 |
| Accrued expenses | | | 1.8 | | | 0.7 | 0.4 | 0.6 |
| Other | | | | | | 5.3 | | |
| Other operating activities | | | -4.7 | -7.2 | | -6.9 | -7.4 | -7.5 |
| Cash from operations | | | -19.4 | -18.1 | | -16.5 | -16.7 | -16.8 |
| |
| Capital expenditures | | | -0.4 | -0.1 | | -0.2 | -0.1 | 0.1 |
| Purchases of property and equipment | | | -0.4 | -0.1 | | -0.2 | -0.1 | 0.1 |
| Sales of short-term investments, net [+] | | | 23.1 | 34.4 | | 26.3 | 28.8 | 28.0 |
| Purchases of short-term investments | | | 5.2 | | | 13.7 | 13.6 | 8.0 |
| Sales of short-term investments | | | 17.9 | 11.7 | | 12.6 | 15.2 | |
| Other cash from investing | | | -15.3 | -32.8 | | | | -32.8 |
| Cash from investing | | | 7.4 | 1.5 | | -6.7 | -4.2 | -4.7 |
| |
| Option exercises | | | 0.1 | | | 0.1 | | 0.1 |
| Other cash from financing | | | 4.3 | 9.6 | | 10.5 | 12.3 | 14.1 |
| Cash from financing | | | 4.2 | 9.4 | | 10.4 | 12.2 | 14.1 |
| |
| Free cash flow | | | -19.8 | -18.1 | | -16.7 | -16.8 | -16.7 |
| Per share (diluted) | | | ($3.04) | ($3.34) | | ($2.46) | ($2.71) | ($3.01) |
| |
| Cash paid for interest | | | 0.6 | 0.6 | | 0.6 | 0.6 | 0.6 |
| Cash paid for income taxes | | | 0.0 | | | | | 0.0 |