In millions, except per share items | Mar-31-22 | Mar-31-21 | Mar-31-20 | Mar-31-19 | Mar-31-18 | Dec-31-17 | Dec-31-16 | Jun-30-16 |
| 10-K | 10-K | 10-K | 10-K | S-1 | 10-K | 10-K | 10-K |
Cash flows from operating activities | | | | | | | | |
Net loss | -44.1 | -22.9 | -19.9 | -6.6 | | | | |
|
Adjustments to reconcile net loss to net cash used in operating activities | | | | | | | | |
Depreciation and amortization | | | | | | | 0.0 | |
Stock-based compensation | 7.8 | 4.9 | 3.6 | 2.4 | 0.6 | 4.4 | 0.4 | |
Amortization of debt discount | | | | | | | 1.1 | |
|
Changes in: | | | | | | | | |
Accounts receivable | 0.1 | -0.4 | | | | | | |
Other current assets and prepaid expenses | -0.8 | -0.5 | -0.4 | -0.7 | 0.1 | 0.0 | | |
Accounts payable | -0.3 | -1.0 | 1.1 | 0.3 | 0.3 | 0.1 | 0.4 | |
Accrued expenses | 4.9 | 0.7 | | | | | | |
Net cash used in operating activities | -23.1 | -19.6 | -15.3 | 1.3 | -8.7 | -7.1 | -0.7 | |
|
Cash flows from investing activities | | | | | | | | |
Purchase of marketable securities | | | -37.3 | -12.2 | -8.3 | -2.0 | | |
Proceeds from sale of marketable securities | | | 41.8 | 10.5 | | 1.4 | | |
Purchase of property and equipment | -1.4 | -0.9 | 0.0 | -0.1 | -0.2 | -0.2 | | |
Net cash used in investing activities | -1.5 | -0.9 | 4.4 | -1.8 | -8.5 | -1.1 | 0.0 | |
|
Cash flows from financing activities | | | | | | | | |
Proceeds from issuance of common stock through at the market offerings | 61.7 | 11.9 | 29.9 | 0.8 | | 9.9 | | |
Proceeds from issuance of common stock through exercise of stock options | 0.3 | 0.0 | | 0.0 | | 0.0 | | |
Proceeds from loan | 1.0 | 0.6 | 0.4 | 0.3 | 10.8 | | | |
Payment of loan | -0.7 | -0.4 | -0.3 | 0.0 | | 0.0 | | |
Net cash provided by and (used in) financing activities | 79.5 | 30.3 | 34.9 | 1.1 | 10.8 | 9.5 | 0.6 | |
Effect of exchange rate changes on cash and cash equivalents | 0.1 | | | | | | | |
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Supplemental disclosure of non-cash investing and financing activities | | | | | | | | |
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Derivative liability | | | | | | | | |
Right-of-use assets | | | | | | | | |
Operating lease liability | | | | | | | | |
Supplemental disclosure of cash flow items: | | | | | | | | |
Interest paid | 0.3 | 0.5 | 0.0 | | | | | |
Income taxes paid | | | | | | | | |