| In millions, except per share items | Mar-31-12 | Dec-31-11 | Sep-30-11 | Jun-30-11 | Mar-31-11 | Dec-31-10 | Sep-30-10 | Jun-30-10 |
| | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K | 10-Q | 10-Q |
| Cash flows from operating activities | | | | | | | | |
| Net loss | -15.5 | -22.6 | -36.9 | -37.4 | -41.1 | | | |
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| Adjustments to reconcile net loss to net cash from operating activities: | | | | | | | | |
| Depreciation | 7.3 | 6.5 | 7.7 | 7.3 | 6.8 | | | |
| Amortization of intangible assets and capitalized software | 1.8 | 1.9 | 2.4 | 2.7 | 3.2 | | | |
| Stock-based compensation | 4.1 | 4.4 | 4.9 | 5.3 | 4.5 | | | |
| Changes in operating assets and liabilities: | | | | | | | | |
| Billed and unbilled accounts receivable, net | 1.9 | 10.9 | 17.3 | 2.1 | -3.1 | | | |
| Inventory, net | -1.1 | -3.7 | -4.4 | -3.8 | -4.5 | | | |
| Deferred costs and other assets | -1.1 | -0.9 | 0.0 | 0.8 | -1.5 | | | |
| Accounts payable | -1.8 | -3.1 | -1.3 | -0.2 | 2.2 | | | |
| Accrued expenses and other liabilities | -3.4 | -7.3 | -8.0 | -1.5 | -1.6 | | | |
| Deferred revenue | 6.5 | 2.9 | -7.0 | -5.3 | 3.2 | | | |
| Net cash (used in) provided by operating activities | 0.6 | -8.9 | -13.4 | -17.8 | -20.2 | | | |
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| Cash flows from investing activities | | | | | | | | |
| Other | | | | | | | | |
| Changes in restricted cash | -5.7 | 2.0 | 0.7 | 1.0 | 1.1 | | | |
| Purchases of marketable securities | | | | | | -26.0 | -28.3 | |
| Maturities/sales of marketable securities | | | | 69.2 | 59.6 | 31.9 | 33.3 | 29.7 |
| Purchases of property and equipment | -13.3 | -13.2 | -17.3 | -16.0 | -13.9 | | | |
| Net cash provided by (used in) investing activities | 7.1 | 42.5 | 32.1 | 36.9 | 20.4 | | | |
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| Cash flows from financing activities | | | | | | | | |
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| Borrowings under SVB loan facility | | | | | | | | |
| Repayment of debt facility | -11.3 | -0.8 | 9.3 | 9.3 | -0.8 | | | |
| Net cash provided by financing activities | 2.6 | 1.1 | 15.5 | 10.8 | 10.5 | | | |
| Net change in cash and cash equivalents | 10.3 | 34.8 | 34.1 | 29.9 | 10.7 | | | |
| Cash and cash equivalents at beginning of period | 31.4 | | | 15.6 | 23.9 | | | |
| Cash and cash equivalents at end of period | 41.7 | 50.4 | 49.7 | 45.5 | 34.5 | | | |
| Cash paid for interest | 2.5 | 2.3 | 1.8 | 1.5 | 1.2 | | | |
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| Supplemental disclosure of noncash investing and financing activities | | | | | | | | |