| In millions, except per share items | Dec-31-12 | Dec-31-11 | Dec-31-10 | Dec-31-09 | Dec-31-08 | Dec-31-07 | Dec-31-06 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K |
| Net income | 0.7 | 7.1 | 5.2 | 2.6 | 4.7 | 7.2 | 5.2 |
| Depreciation and amortization | 2.5 | 2.4 | 2.2 | 1.9 | 1.8 | 1.0 | 1.2 |
| Stock-based compensation | 1.3 | 1.3 | 1.4 | 1.2 | | | |
| Deferred taxes | -1.4 | 2.7 | -0.8 | -2.4 | | | |
| Change in working capital [+] | 3.2 | 1.8 | -8.1 | 0.6 | 0.0 | -0.5 | -1.7 |
| Accounts receivable | | | | | -0.6 | 0.1 | -0.8 |
| Other | 3.2 | 1.8 | -8.1 | 0.6 | 0.6 | -0.6 | -0.9 |
| Other operating activities | 9.8 | 1.3 | 9.5 | 1.6 | 0.2 | 1.1 | 3.8 |
| Cash from operations | 16.2 | 16.7 | 9.5 | 5.6 | 6.6 | 8.8 | 8.5 |
| |
| Capital expenditures | 0.0 | 0.0 | 0.0 | 0.0 | -8.5 | -3.5 | -3.2 |
| Purchases of property and equipment | | | | | -8.5 | -3.5 | -3.2 |
| Sales of short-term investments, net [+] | 268.8 | 245.9 | 394.1 | 139.0 | | | |
| Purchases of short-term investments | -8.7 | -6.8 | -25.5 | -29.0 | | | |
| Sales of short-term investments | 277.5 | 252.8 | 419.6 | 168.0 | | | |
| Other cash from investing | -146.9 | -336.2 | -514.5 | -401.4 | | | |
| Cash from investing | 121.9 | -90.2 | -120.4 | -262.4 | -184.5 | -0.7 | -40.5 |
| |
| Cash dividends paid | -2.3 | -2.2 | -2.4 | -2.4 | | | |
| Issuance of common stock, net | -2.3 | | -7.5 | | -7.1 | -22.8 | 96.1 |
| Other cash from financing | -73.8 | 70.9 | 159.5 | 229.7 | 170.1 | 45.2 | -27.6 |
| Cash from financing | -78.4 | 68.7 | 149.6 | 227.3 | 163.0 | 22.4 | 68.5 |
| |
| Free cash flow | 16.2 | 16.7 | 9.5 | 5.6 | -1.9 | 5.3 | 5.4 |
| Per share (diluted) | $0.55 | $0.56 | $0.31 | $182.82 | ($0.06) | $0.17 | $0.20 |
| |
| Cash paid for interest | 15.7 | 21.0 | 20.7 | 22.1 | | | |