| In millions, except per share items | Jun-30-23 | Dec-31-22 | Sep-30-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | 7.2 | 8.1 | 7.2 | 3.9 | 6.5 | 5.4 | 5.4 | 5.3 |
| Depreciation and amortization [+] | 0.3 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 |
| Depreciation | | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Amortization of intangible assets | 0.3 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Stock-based compensation | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.4 |
| Change in working capital [+] | | 3.7 | 3.4 | 1.1 | -6.5 | 1.4 | -3.9 | 4.6 |
| Accrued expenses | | 6.0 | 2.7 | 1.6 | -6.1 | 3.7 | -5.0 | 3.2 |
| Other | | -2.3 | 0.8 | -0.4 | -0.4 | -2.3 | 1.1 | 1.4 |
| Other operating activities | -8.5 | 2.9 | 1.1 | 2.3 | 1.6 | -3.1 | -5.9 | -3.4 |
| Cash from operations | -0.8 | 15.9 | 12.9 | 8.7 | 2.8 | 5.0 | -3.1 | 7.8 |
| |
| Capital expenditures | 0.0 | -0.2 | -0.3 | -0.2 | -0.2 | -0.2 | -0.4 | -0.3 |
| Purchases of property and equipment | | -0.2 | -0.3 | -0.2 | -0.2 | -0.2 | -0.4 | -0.3 |
| Purchases of short-term investments, net | | -1.4 | 2.7 | 1.0 | -20.1 | -32.6 | -5.9 | -24.5 |
| Purchases of short-term investments | | -3.2 | -1.0 | -2.0 | -22.7 | -41.3 | -9.8 | -35.5 |
| Sales of short-term investments | | 1.8 | 3.7 | 3.0 | 2.5 | 8.7 | 3.9 | 10.9 |
| Other cash from investing | | -27.1 | 3.3 | -1.5 | 97.8 | -14.4 | -43.9 | -8.5 |
| Cash from investing | 0.0 | -28.7 | 5.8 | -0.6 | 77.5 | -47.2 | -50.2 | -33.3 |
| |
| Cash dividends paid | | -0.7 | -1.4 | -0.7 | | | | |
| Issuance of common stock, net | | -4.4 | -7.8 | -4.4 | 62.9 | -0.1 | -0.4 | -8.8 |
| Other cash from financing | | -30.0 | -139.4 | -75.6 | -95.7 | -22.5 | 29.5 | 45.3 |
| Cash from financing | 0.0 | -35.0 | -148.6 | -80.7 | -32.8 | -22.6 | 29.1 | 36.4 |
| |
| Free cash flow | -0.8 | 15.6 | 12.7 | 8.5 | 2.7 | 4.8 | -3.5 | 7.5 |
| Per share (diluted) | ($0.07) | $1.19 | $0.95 | $0.63 | $0.21 | $0.44 | ($0.32) | $0.69 |
| |
| Cash paid for interest | | 2.0 | 3.3 | 1.6 | 3.3 | 1.3 | 3.1 | 2.4 |
| Cash paid for income taxes | | 1.8 | 3.1 | -4.2 | 7.0 | 1.9 | 1.6 | 3.6 |