| 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 | 8-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Net income | 12.9 | 13.1 | 11.1 | 10.2 | 6.2 | 7.3 | 6.7 | 7.0 |
| Depreciation and amortization | | | 0.5 | 0.4 | 0.4 | 0.4 | 0.4 | 0.4 |
| Stock-based compensation | | | 0.7 | 0.6 | 0.5 | 0.4 | 0.3 | 0.3 |
| Deferred taxes | | | -2.1 | -4.5 | 0.0 | -3.0 | 0.0 | |
| Change in working capital [+] | | | -19.5 | 22.6 | -15.2 | | -0.5 | |
| Accounts receivable | | | -19.5 | 12.3 | -15.2 | | -0.5 | |
| Other | | | | 10.2 | | | | |
| Other operating activities | 52.6 | | 30.6 | -16.4 | 16.0 | 6.4 | 5.6 | -5.3 |
| Cash from operations | 65.5 | | 21.2 | 12.8 | 8.0 | 11.4 | 12.5 | 2.4 |
| |
| Capital expenditures | 0.0 | | -0.3 | -1.0 | -1.3 | -0.4 | -0.4 | -1.3 |
| Purchases of property and equipment | | | -0.3 | -1.0 | -1.3 | -0.4 | -0.4 | -1.3 |
| Purchases of short-term investments, net | | | 10.0 | 25.0 | -99.9 | -1.7 | -7.5 | -4.6 |
| Purchases of short-term investments | | | | | -134.9 | -60.0 | -37.5 | -5.0 |
| Sales of short-term investments | | | 10.0 | 25.0 | 35.0 | 58.3 | 30.0 | 0.4 |
| Other cash from investing | | | -174.0 | -583.4 | -76.5 | -199.3 | -440.5 | 22.5 |
| Cash from investing | 0.0 | | -164.3 | -559.4 | -177.7 | -201.4 | -448.4 | 16.6 |
| |
| Issuance of common stock, net | | | | | | 32.4 | | |
| Option exercises | | | 0.0 | 0.1 | 0.2 | 0.1 | 0.0 | 0.1 |
| Other cash from financing | | | 139.8 | 121.0 | 188.1 | 140.4 | 436.2 | -4.3 |
| Cash from financing | 0.0 | | 139.8 | 120.9 | 187.9 | 172.7 | 436.2 | -4.4 |
| |
| Free cash flow | 65.5 | | 20.9 | 11.8 | 6.7 | 11.0 | 12.1 | 1.1 |
| Per share (diluted) | $4.82 | | $1.55 | $0.88 | $0.50 | $0.88 | $0.97 | $0.09 |
| |
| Cash paid for interest | | | 6.2 | 2.1 | 0.8 | 0.6 | 0.8 | 1.3 |
| Cash paid for income taxes | | | 6.2 | 5.2 | 0.0 | 2.0 | 2.5 | 4.3 |