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 |
Cash flows from operating activities: | | | | | | | | |
Net loss | -9.6 | -8.3 | -7.6 | | | | | |
Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
Stock-based compensation | 1.5 | 1.5 | 0.6 | 0.3 | 0.3 | 0.5 | 1.1 | 0.6 |
Depreciation | 0.4 | 0.1 | | | | 0.7 | 0.7 | 0.5 |
Changes in assets and liabilities: | | | | | | | | |
Accounts receivable | -0.2 | -0.1 | 0.1 | -0.1 | 0.0 | 0.1 | 0.0 | 0.0 |
Accounts payable | 0.4 | -0.2 | 0.2 | 0.1 | 0.0 | -0.1 | 0.0 | -0.2 |
Other assets and liabilities | 0.4 | 0.1 | -0.1 | 0.9 | -0.4 | -0.6 | 0.5 | -0.3 |
Net cash used in operating activities | -7.6 | -6.8 | -7.4 | -6.9 | -8.5 | -10.8 | -8.8 | -13.3 |
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Cash flows from investing activities: | | | | | | | | |
Purchases of property and equipment | -1.8 | -0.6 | -0.2 | | | 0.0 | -0.5 | -0.8 |
Purchases of short-term investments | | | | | | | | |
Proceeds from short-term investments | | | | | | | | |
Net cash used in investing activities | -3.8 | -0.6 | -27.6 | | 3.6 | 9.2 | 7.9 | 15.5 |
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Cash flows from financing activities: | | | | | | | | |
Purchase of treasury shares | -0.1 | | | | 0.0 | 0.0 | -1.3 | -0.2 |
Net cash used in financing activities | -0.8 | -2.1 | 67.6 | 8.7 | 5.9 | 0.0 | -1.3 | -0.1 |
Net change in cash and cash equivalents | -12.2 | -9.5 | 32.6 | 1.8 | 1.0 | | | |
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Supplemental disclosures of cash flow information: | | | | | | | | |
Cash paid for interest | 0.1 | 0.5 | 0.0 | | | | | |
Acquisition of equipment through financing lease | 0.1 | 0.4 | | | | | | |
Income taxes paid | 0.0 | | | | | | | |