| In millions, except per share items | Jun-30-21 | Mar-31-21 | Dec-31-20 | Sep-30-20 | Jun-30-20 | Jun-05-20 | Mar-31-20 | Mar-05-20 |
| | 10-Q | 8-K | 10-K | 10-Q | 10-Q | 8-K | 10-Q | 8-K |
| Net income | -27.5 | -18.4 | -21.9 | -16.0 | -24.2 | -24.1 | -29.2 | -29.2 |
| Depreciation and amortization | 0.7 | | 0.4 | 0.4 | 0.3 | | 0.3 | |
| Stock-based compensation | 5.0 | | 2.1 | 2.1 | 2.1 | | 2.0 | |
| Change in working capital [+] | -5.7 | | 30.2 | -8.4 | -3.2 | | -3.1 | |
| Accounts receivable | -5.4 | | 5.1 | -8.8 | -0.6 | | 2.2 | |
| Inventories | -3.9 | | -1.7 | -0.8 | -2.7 | | 0.0 | |
| Accounts payable | 2.1 | | -1.6 | 0.3 | 0.6 | | -1.8 | |
| Accrued expenses | 0.6 | | 4.3 | 0.8 | -2.6 | | -4.7 | |
| Other | 1.0 | | 24.1 | 0.0 | 2.1 | | 1.2 | |
| Other operating activities | -16.4 | | -21.8 | 5.0 | 1.3 | | 1.0 | |
| Cash from operations | -44.0 | | -10.9 | -17.0 | -23.8 | | -28.9 | |
| |
| Capital expenditures | -0.6 | | -0.2 | 0.0 | -0.1 | | 0.0 | |
| Purchases of property and equipment | -0.6 | | -0.2 | 0.0 | -0.1 | | 0.0 | |
| Purchases of short-term investments | | | -101.8 | | | | | |
| Purchases of short-term investments | | | -101.8 | | | | | |
| Other cash from investing | 43.5 | | 109.2 | -60.7 | 17.5 | | 8.7 | |
| Cash from investing | 42.9 | | 7.2 | -60.7 | 17.3 | | 8.7 | |
| |
| Issuance of common stock, net | 27.0 | | | 3.0 | 20.1 | | 42.7 | |
| Option exercises | 0.5 | | 0.3 | 0.1 | 0.4 | | | |
| Financing costs | | | -0.1 | -1.0 | -4.6 | | | |
| Other cash from financing | 0.7 | | 3.6 | 9.1 | 45.4 | | -2.7 | |
| Cash from financing | 27.1 | | 3.3 | 13.1 | 69.6 | | 40.1 | |
| |
| Free cash flow | -44.6 | | -11.1 | -17.0 | -23.9 | | -29.0 | |
| Per share (diluted) | ($0.67) | | ($0.26) | ($0.37) | ($0.63) | | ($0.88) | |
| |
| Cash paid for interest | 3.2 | | 0.9 | 0.9 | 1.5 | | 1.3 | |