| In millions, except per share items | Jun-30-23 | Mar-31-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 |
| | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net income | -18.3 | -12.0 | -9.9 | -7.1 | -4.8 | -0.7 | 0.9 | 3.1 |
| Depreciation and amortization [+] | 2.1 | 1.8 | 1.5 | 1.3 | 1.4 | 1.3 | 1.2 | 1.3 |
| Depreciation | 2.0 | 1.8 | 1.5 | 1.3 | 1.3 | 1.2 | 1.2 | 1.2 |
| Amortization of intangible assets | | | | 0.0 | | | | 0.0 |
| Other amortization | 0.0 | 0.0 | 0.0 | | | | | |
| Stock-based compensation | 0.6 | 0.8 | 0.8 | 0.7 | 0.7 | 0.6 | 0.6 | 0.5 |
| Deferred taxes | | 0.1 | -0.1 | -0.2 | -0.4 | | | |
| Change in working capital [+] | -3.4 | -5.4 | -1.5 | -2.3 | -3.7 | -3.1 | -3.5 | -3.9 |
| Accounts receivable | 0.1 | -1.2 | 1.8 | 0.0 | 0.1 | 0.6 | -0.4 | 0.8 |
| Inventories | -1.5 | -1.7 | -1.8 | -1.0 | -0.6 | 0.0 | 0.5 | 0.7 |
| Other current assets | -0.2 | -0.5 | -0.2 | 0.0 | -0.5 | -0.1 | -0.2 | -0.1 |
| Other | -1.8 | -2.1 | -1.3 | -1.3 | -2.7 | -3.5 | -3.4 | -5.4 |
| Other operating activities | 7.9 | 4.3 | 2.3 | 2.0 | 3.8 | 0.9 | 0.7 | 0.3 |
| Cash from operations | -10.7 | -10.5 | -6.9 | -5.6 | -3.0 | -1.0 | -0.1 | 1.2 |
| |
| Capital expenditures [+] | -2.9 | -4.8 | -5.1 | -5.0 | -4.9 | -3.0 | -2.1 | -1.5 |
| Purchases of property and equipment | -0.6 | -1.8 | -2.2 | -2.6 | -3.2 | -2.1 | -1.8 | -1.5 |
| Capitalized product costs | | -3.0 | -2.9 | -2.4 | -1.7 | -1.0 | -0.3 | |
| Cash from investing | -2.9 | -4.8 | -5.1 | -5.0 | -4.9 | -3.0 | -2.1 | -1.5 |
| |
| Issuance of common stock, net | | 5.2 | 5.2 | 4.0 | 7.4 | 3.5 | | 3.4 |
| Option exercises | | 0.0 | 0.1 | 0.1 | 0.1 | 0.2 | 0.2 | 0.3 |
| Financing costs | | | -0.2 | | | | | |
| Other cash from financing | 10.0 | 8.6 | 8.6 | 0.6 | 0.2 | -0.1 | -0.3 | -0.5 |
| Cash from financing | 11.4 | 13.9 | 13.9 | 4.5 | 7.4 | 3.2 | 3.0 | 2.7 |
| |
| Free cash flow | -11.3 | -12.3 | -9.1 | -8.2 | -6.2 | -3.0 | -1.9 | -0.2 |
| Per share (diluted) | ($1.19) | ($1.39) | ($1.17) | ($1.10) | ($0.85) | ($0.45) | ($0.25) | ($0.03) |
| |
| Cash paid for interest | 0.6 | 0.3 | 0.1 | | | | 0.0 | |
| Cash paid for income taxes | 0.0 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |