| In millions, except per share items | Dec-31-11 | Sep-30-11 | Jun-30-11 | Mar-31-11 | Dec-31-10 | Sep-30-10 | Jun-30-10 | Mar-31-10 |
| | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Cash flows from operating activities: | | | | | | | | |
| Net income | 16.1 | 3.7 | 2.8 | | 3.5 | 1.3 | -0.2 | |
| Adjustments to reconcile net income (loss) to net cash from (used in) operating activities: | | | | | | | | |
| Depreciation and amortization | 3.5 | 3.4 | 2.2 | | 2.1 | 1.6 | 1.1 | |
| Amortization of intangible assets | 2.3 | 2.0 | 1.1 | | 1.0 | 0.8 | 0.6 | |
| Amortization of software development costs | 0.7 | 0.5 | 0.2 | | 0.1 | 0.0 | | |
| Amortization of debt issuance costs | | | | | | 0.0 | | |
| Deferred taxes | -12.3 | | | | | | | |
| Stock-based compensation | 4.7 | 4.5 | 2.7 | | 2.0 | 1.6 | | |
| Gain on sale of fixed assets | | | | | -0.1 | | | |
| Changes in operating assets and liabilities: | | | | | | | | |
| Accounts receivable | -5.1 | -5.3 | -3.1 | | 1.0 | -1.3 | | |
| Prepaid expenses and other assets | 0.1 | 0.8 | 0.6 | | 0.2 | -0.3 | | |
| Accounts payable | 2.0 | 1.6 | 1.2 | | 0.0 | 0.1 | | |
| Accrued liabilities and accrued compensation | -0.1 | -0.5 | -0.4 | | 0.6 | 0.0 | | |
| Deferred revenue | -2.9 | -2.1 | -0.7 | | -1.4 | -1.0 | | |
| Net cash provided by operating activities | 8.9 | 8.7 | 6.6 | | 9.1 | 5.7 | 2.9 | |
| |
| Cash flows from investing activities: | | | | | | | | |
| Purchases of marketable securities | -56.6 | -49.9 | -71.4 | -62.0 | -46.9 | -32.6 | | |
| Sales of marketable securities | 54.8 | 38.9 | 21.8 | 13.9 | | | | |
| Proceeds from maturities of marketable securities | 40.8 | 36.9 | 10.9 | | | | | |
| Increase in restricted cash | -1.1 | | | | | -1.2 | | |
| Capitalized software development costs | -2.2 | -2.0 | -1.5 | -1.1 | -0.9 | -0.6 | -0.5 | -0.2 |
| Cost of acquisitions, net of cash acquired | -11.2 | -11.2 | -4.4 | | | | | |
| Purchase of property and equipment, net | -4.1 | -4.5 | -2.7 | | -2.6 | -3.3 | | |
| Net cash used in investing activities | -24.4 | -22.5 | -49.7 | | -41.7 | -37.8 | | |
| |
| Cash flows from financing activities: | | | | | | | | |
| Payments made on long-term debt and capital lease obligations | | 0.0 | 0.0 | | -2.2 | -4.4 | | |
| Shares acquired to settle employee tax withholding liability | -0.2 | -0.2 | -0.1 | | | | | |
| Proceeds from issuance of common stock upon exercise of options | 3.3 | 3.2 | 1.7 | | 0.7 | 0.2 | | |
| Net cash provided by financing activities | 3.1 | 3.0 | 1.5 | | 34.4 | 31.7 | | |
| Net change in cash and cash equivalents | -12.4 | -10.9 | -41.6 | | 1.8 | 3.5 | | |
| Effect of exchange rates on cash and cash equivalents | 0.0 | 0.0 | | | | | | |
| Cash and cash equivalents at beginning of year | | 36.9 | 18.4 | | | | 16.7 | |
| Cash and cash equivalents at end of year | 24.5 | 26.0 | -23.1 | | 18.4 | 20.2 | 52.0 | |
| |
| Supplemental information: | | | | | | | | |
| Interest paid | | | | | 0.1 | | | |
| Noncash financing activities: | | | | | | | | |
| Conversion of convertible preferred stock to common stock upon initial public offering | | 0.0 | | | | | | |