In millions, except per share items | Jun-30-23 | Mar-31-23 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| 10-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
Cash flows from operating activities: | | | | | | | | |
Net loss | | | -10.9 | -10.4 | -9.8 | | -9.6 | -7.6 |
Adjustments to reconcile net loss to net cash used in operating activities: | | | | | | | | |
Stock-based compensation | | | 1.6 | 1.5 | 1.2 | 0.7 | 0.3 | |
Changes in assets and liabilities: | | | | | | | | |
Accounts receivable | | | 0.2 | -0.1 | -0.1 | -0.1 | -0.3 | |
Accounts payable | | | 0.2 | -0.2 | -0.3 | -0.3 | -0.1 | |
Other assets and liabilities | | | -0.6 | 0.1 | 0.1 | -0.3 | 0.1 | -0.1 |
Net cash used in operating activities | | | -7.0 | -6.8 | -6.4 | -8.4 | -8.1 | -7.4 |
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Cash flows from investing activities: | | | | | | | | |
Purchases of property and equipment | | | -0.8 | -0.6 | -0.6 | -0.5 | -0.3 | -0.2 |
Purchases of short-term investments | | | | | | | | |
Proceeds from short-term investments | | | | | | | | |
Net cash used in investing activities | | | -5.7 | -0.6 | -28.0 | -27.8 | -27.7 | -27.6 |
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Cash flows from financing activities: | | | | | | | | |
Net cash used in financing activities | | | -0.6 | -2.1 | -2.1 | -23.8 | -2.0 | |
Net change in cash and cash equivalents | | | -13.4 | -9.5 | -7.6 | -25.1 | -2.8 | |
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Supplemental disclosures of cash flow information: | | | | | | | | |
Cash paid for interest | | | 0.1 | 0.5 | 0.0 | 0.0 | 0.5 | |
Income taxes paid | | | 0.0 | | | | | |