| In millions, except per share items | Jul-31-21 | Jul-31-20 | Jul-31-19 | Jul-31-18 | Jul-31-17 | Jul-31-16 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | -24.8 | -10.8 | -4.7 | -11.6 | 0.1 | 0.7 |
| Depreciation and amortization | 1.5 | 1.9 | 1.8 | 1.7 | 1.7 | 1.6 |
| Asset impairment charges | 7.7 | 4.8 | | | | |
| Stock-based compensation | 6.6 | 0.7 | | | | |
| Deferred taxes | 0.0 | 0.0 | 0.0 | 8.9 | -0.3 | 0.4 |
| Change in working capital [+] | -8.1 | -1.7 | 0.7 | 7.2 | -2.6 | -3.0 |
| Accounts receivable | -0.2 | 0.1 | -0.3 | | | |
| Other current assets | -0.8 | 0.2 | -0.1 | | | |
| Other | -7.1 | -2.0 | 1.0 | 7.2 | -2.6 | -3.0 |
| Other operating activities | 1.4 | 0.4 | -0.9 | -7.9 | -0.6 | 0.4 |
| Cash from operations | -15.6 | -4.7 | -3.1 | -1.8 | -1.6 | 0.1 |
| |
| Capital expenditures [+] | -0.2 | -0.5 | -0.4 | 0.7 | 1.8 | 1.6 |
| Purchases of property and equipment | -0.2 | -0.5 | -0.4 | 0.7 | 1.8 | 1.6 |
| Sales of property and equipment | 3.7 | | | | | |
| Sales of short-term investments | 7.0 | | 25.0 | 6.7 | | |
| Sales of short-term investments | 7.0 | | 25.0 | 6.7 | | |
| Other cash from investing | -18.6 | -0.5 | -55.9 | -3.3 | -13.0 | -5.2 |
| Cash from investing | -8.2 | -1.0 | -31.2 | 4.1 | -11.2 | -3.7 |
| |
| Issuance of common stock, net | 13.0 | | 7.8 | | | |
| Option exercises | 0.1 | 0.0 | 0.2 | | | |
| Financing costs | -0.5 | | | | | |
| Other cash from financing | 16.9 | -0.1 | 23.3 | 1.8 | 22.3 | 0.3 |
| Cash from financing | 30.3 | -0.1 | 30.9 | 1.8 | 22.3 | 0.3 |
| |
| Free cash flow | -15.8 | -5.2 | -3.5 | -1.1 | 0.2 | 1.6 |
| Per share (diluted) | ($0.96) | ($0.33) | ($0.27) | ($0.09) | $0.02 | $0.13 |