| In millions, except per share items | Jun-30-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Net income | -17.8 | 0.0 | -9.4 | 5.2 | -13.8 | -1.0 | | -9.2 |
| Depreciation and amortization [+] | 1.2 | | 1.9 | 2.1 | 2.2 | 2.2 | 2.3 | 2.3 |
| Depreciation | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.7 | 0.7 |
| Amortization | 0.6 | | 1.2 | 1.4 | 1.4 | 1.4 | 1.5 | 1.6 |
| Asset impairment charges | 1.6 | | | | | | | |
| Stock-based compensation | 4.5 | | 1.3 | 1.4 | 1.4 | 0.3 | 1.3 | 1.3 |
| Deferred taxes | | | -0.1 | 0.8 | 6.5 | -1.5 | -1.5 | -0.7 |
| Change in working capital [+] | | | -6.5 | 10.5 | 24.4 | -5.6 | 4.7 | 12.2 |
| Accounts receivable | | | -4.5 | 19.9 | -9.4 | 0.5 | 3.5 | 8.6 |
| Inventories | | | -0.2 | -0.3 | 1.1 | -2.5 | 1.8 | 1.7 |
| Accounts payable | | | 2.1 | -0.9 | 0.4 | 1.1 | 1.1 | 0.1 |
| Accrued expenses | | | -0.7 | -2.7 | 3.1 | -3.7 | 0.6 | 3.1 |
| Deferred revenues | | | -2.0 | -5.2 | 11.6 | -0.9 | -1.3 | 0.3 |
| Income taxes | | | -1.3 | -0.3 | 17.7 | 0.0 | -1.0 | -1.6 |
| Other operating activities | 16.6 | | -2.2 | -16.3 | -19.0 | -0.1 | | -2.4 |
| Cash from operations | 6.1 | | -14.9 | 3.7 | 1.7 | -5.6 | -2.4 | 3.6 |
| |
| Capital expenditures | 0.0 | | -0.8 | -0.3 | -0.6 | -0.3 | -0.5 | -0.8 |
| Purchases of property and equipment | | | -0.8 | -0.3 | -0.6 | -0.3 | -0.5 | -0.8 |
| Purchases of intangible assets | | | 0.0 | 0.0 | 0.0 | | 0.0 | 0.0 |
| Sales of short-term investments, net [+] | | | 16.1 | -1.3 | 4.0 | 3.4 | 1.5 | -17.7 |
| Purchases of short-term investments | | | | -15.8 | -14.0 | -13.6 | -7.0 | -25.2 |
| Sales of short-term investments | | | 16.1 | 14.5 | 18.0 | 17.0 | 8.5 | 7.6 |
| Other cash from investing | | | | 18.9 | 0.0 | | | |
| Cash from investing | 0.0 | | 15.3 | 17.3 | 3.3 | 3.1 | 1.1 | -18.4 |
| |
| Repurchase of common stock, net | | | -5.7 | | | -4.6 | -2.9 | |
| Other cash from financing | | | -0.1 | -0.6 | -0.1 | -0.6 | | -2.1 |
| Cash from financing | 0.0 | | -5.8 | -0.6 | -0.1 | -5.1 | -3.0 | -2.1 |
| |
| Free cash flow | 6.1 | | -15.7 | 3.4 | 1.0 | -5.9 | -2.9 | 2.8 |
| Per share (diluted) | $0.15 | | ($0.39) | $0.09 | $0.03 | ($0.15) | | $0.07 |
| |
| Cash paid for income taxes | | | 2.0 | | | | | |