| In millions, except per share items | Jun-30-23 | Jun-30-22 | Jun-30-21 | Jun-30-20 | Jun-30-19 | Jun-30-18 | Jun-30-17 | Jun-30-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -9.6 | -8.3 | -7.6 | -8.3 | -7.5 | -13.3 | -11.6 | -13.1 |
| Depreciation and amortization [+] | 0.4 | 0.1 | 0.2 | 0.5 | 0.3 | 0.8 | 0.7 | 0.6 |
| Depreciation | 0.4 | 0.1 | 0.2 | 0.5 | 0.3 | 0.7 | 0.7 | 0.5 |
| Amortization of intangible assets | | | | | | 0.0 | 0.0 | 0.0 |
| Asset impairment charges | | | 0.2 | | | 1.7 | | |
| Stock-based compensation | 1.5 | 1.5 | 0.6 | 0.3 | 0.3 | 0.5 | 1.1 | 0.6 |
| Deferred taxes | | | | | -0.4 | | | |
| Change in working capital [+] | -2.1 | -1.8 | -0.1 | -0.4 | -0.7 | 0.0 | 0.0 | -0.3 |
| Accounts receivable | -0.2 | -0.1 | 0.1 | -0.1 | 0.0 | 0.1 | 0.0 | 0.0 |
| Inventories | -0.5 | 0.0 | -0.8 | -0.3 | -0.3 | | | |
| Accounts payable | 0.4 | -0.2 | 0.2 | 0.1 | 0.0 | -0.1 | 0.0 | -0.2 |
| Income taxes | -1.8 | -1.5 | -1.4 | -3.0 | 1.3 | 3.6 | 0.0 | -0.2 |
| Other | 0.0 | | 1.8 | 3.0 | -1.8 | -3.6 | | |
| Other operating activities | 2.3 | 1.7 | -0.7 | 0.9 | -0.4 | -0.4 | 0.9 | |
| Cash from operations | -7.6 | -6.8 | -7.4 | -6.9 | -8.5 | -10.8 | -8.8 | -13.3 |
| |
| Capital expenditures | -1.8 | -0.6 | -0.2 | 0.0 | 0.0 | 0.0 | -0.5 | -0.8 |
| Purchases of property and equipment | -1.8 | -0.6 | -0.2 | | | 0.0 | -0.5 | -0.8 |
| Sales of short-term investments, net [+] | | | -27.4 | | 3.6 | 9.2 | 8.4 | 10.2 |
| Purchases of short-term investments | | | -27.4 | | | | | |
| Sales of short-term investments | | | | | 3.6 | 9.2 | 8.4 | 10.2 |
| Other cash from investing | -2.0 | | | | 0.0 | | | 6.1 |
| Cash from investing | -3.8 | -0.6 | -27.6 | 0.0 | 3.6 | 9.2 | 7.9 | 15.5 |
| |
| Issuance of common stock, net | -0.1 | | 67.6 | 5.7 | 5.9 | 0.0 | -1.3 | -0.1 |
| Other cash from financing | -0.7 | -2.1 | 0.0 | 3.0 | 0.0 | | | |
| Cash from financing | -0.8 | -2.1 | 67.6 | 8.7 | 5.9 | 0.0 | -1.3 | -0.1 |
| |
| Free cash flow | -9.5 | -7.4 | -7.6 | -6.9 | -8.5 | -10.8 | -9.3 | -14.1 |
| Per share (diluted) | ($5.85) | ($4.65) | ($0.35) | ($1.09) | ($1.72) | ($2.66) | ($2.28) | ($0.69) |
| |
| Cash paid for interest | 0.1 | 0.5 | 0.0 | | | | | |
| Cash paid for income taxes | 0.0 | | | | | | | 0.2 |