| 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 | -5.1 | 0.0 | -5.9 | -6.5 | 0.0 | -5.2 | -4.5 | -2.6 |
| Depreciation and amortization | 0.1 | | 0.2 | 0.2 | | 0.2 | 0.2 | 0.2 |
| Asset impairment charges | | | -0.1 | | | 0.1 | 0.1 | 0.0 |
| Stock-based compensation | | | -0.3 | | | 0.3 | 0.3 | -0.3 |
| Change in working capital [+] | | | 0.1 | | | 6.5 | -0.4 | 0.7 |
| Accounts receivable | | | -1.3 | | | -0.2 | -0.5 | -0.1 |
| Inventories | | | 0.1 | | | -0.5 | -0.1 | 0.1 |
| Other current assets | | | -0.1 | | | 0.9 | 0.3 | 0.4 |
| Accounts payable | | | 0.4 | | | 0.5 | -0.5 | -0.1 |
| Accrued expenses | | | 1.1 | | | 0.4 | 0.3 | 0.3 |
| Other | | | | | | 5.3 | | |
| Other operating activities | 0.6 | | 0.1 | 0.4 | | -5.3 | 0.1 | -2.4 |
| Cash from operations | -4.4 | | -5.8 | -5.9 | | -3.4 | -4.2 | -4.5 |
| |
| Capital expenditures | 0.0 | | 0.0 | 0.0 | | -0.1 | -0.3 | 0.3 |
| Purchases of property and equipment | 0.0 | | 0.0 | 0.0 | | -0.1 | -0.3 | 0.3 |
| Purchases of short-term investments, net | 3.5 | | 13.8 | 5.4 | | 2.9 | 1.0 | 25.2 |
| Purchases of short-term investments | 3.5 | | 7.6 | | | -0.7 | -1.7 | 25.2 |
| Sales of short-term investments | | | 6.2 | 5.4 | | 3.6 | 2.7 | |
| Other cash from investing | -7.1 | | -15.2 | 0.0 | | | | -32.8 |
| Cash from investing | -3.5 | | -1.4 | 5.4 | | 2.8 | 0.7 | -7.3 |
| |
| Option exercises | | | 0.0 | | | 0.1 | | 0.1 |
| Other cash from financing | -1.3 | | -1.6 | 5.6 | | 0.0 | 0.2 | 3.7 |
| Cash from financing | -1.3 | | -1.6 | 5.6 | | 0.0 | 0.2 | 3.7 |
| |
| Free cash flow | -4.4 | | -5.8 | -5.9 | | -3.4 | -4.6 | -4.2 |
| Per share (diluted) | ($1.97) | | ($0.53) | ($8.88) | | ($0.50) | ($0.61) | ($0.63) |
| |
| Cash paid for interest | 0.1 | | 0.1 | 0.1 | | 0.1 | 0.2 | 0.2 |
| Cash paid for income taxes | 0.0 | | 0.0 | | | | | 0.0 |