| In millions, except per share items | Jun-30-19 | Mar-31-19 | Dec-31-18 | Sep-30-18 | Jun-30-18 | Mar-31-18 | Dec-31-17 | Sep-30-17 |
| | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q |
| Net income | 4.8 | 2.1 | 0.1 | 5.9 | 3.1 | 2.3 | 1.6 | 2.8 |
| Depreciation and amortization [+] | 1.1 | 1.1 | 1.1 | 0.7 | 0.7 | 0.7 | 0.8 | 0.7 |
| Amortization of intangible assets | 0.6 | 0.6 | 0.7 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Stock-based compensation | 1.3 | 1.1 | 1.3 | 0.5 | 1.4 | 1.4 | 1.4 | 0.7 |
| Deferred taxes | | 0.0 | -1.1 | | | | -0.6 | 0.0 |
| Change in working capital | -52.2 | 9.7 | 17.5 | 20.5 | -36.9 | 25.3 | 36.7 | -4.4 |
| Other | -52.2 | 9.7 | 17.5 | 20.5 | -36.9 | 25.3 | 36.7 | -4.4 |
| Other operating activities | -24.7 | 6.2 | 6.9 | 11.4 | -0.7 | -1.0 | 0.9 | 7.2 |
| Cash from operations | -69.7 | 20.1 | 25.8 | 39.1 | -32.4 | 28.7 | 40.9 | 7.1 |
| |
| Capital expenditures | -1.3 | -1.4 | -2.7 | -1.7 | -0.8 | -0.4 | -0.9 | -0.9 |
| Purchases of property and equipment | -1.3 | -1.4 | -2.7 | -1.7 | -0.8 | -0.4 | -0.9 | -0.9 |
| Acquisitions | | | -74.0 | | | | | |
| Purchases of short-term investments, net | 26.8 | -4.0 | -11.6 | -6.9 | -4.2 | -13.3 | -4.9 | -4.4 |
| Purchases of short-term investments | -15.0 | -14.9 | -19.7 | -14.9 | -10.0 | -20.0 | -10.7 | -11.0 |
| Sales of short-term investments | 41.8 | 10.9 | 8.2 | 8.0 | 5.9 | 6.7 | 5.8 | 6.7 |
| Other cash from investing | -64.6 | -6.5 | 38.2 | -27.2 | -73.8 | -37.5 | -72.6 | -30.2 |
| Cash from investing | -39.2 | -11.9 | -50.0 | -35.8 | -78.8 | -51.3 | -78.5 | -35.4 |
| |
| Repurchase of common stock, net | | | | -0.8 | | -0.5 | -0.3 | |
| Other cash from financing | 86.1 | -12.1 | 34.7 | -39.9 | 136.4 | 49.6 | 23.9 | 21.5 |
| Cash from financing | 86.1 | -12.1 | 34.7 | -40.7 | 136.4 | 49.1 | 23.6 | 21.5 |
| |
| Free cash flow | -71.0 | 18.7 | 23.1 | 37.4 | -33.2 | 28.3 | 40.0 | 6.2 |
| Per share (diluted) | ($2.25) | $0.59 | $0.73 | $1.18 | ($1.05) | $0.90 | $1.27 | $0.20 |
| |
| Cash paid for income taxes | 0.3 | 0.6 | 1.0 | 1.0 | 0.1 | 0.7 | 0.3 | 0.0 |