| In millions, except per share items | Dec-31-11 | Dec-31-10 | Dec-31-09 | Dec-31-08 | Dec-31-07 | Dec-31-06 | Dec-31-05 | Dec-31-04 |
| | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | 10-K | S-1/A |
| Cash flows from operating activities | | | | | | | | |
| Net loss | -12.8 | -31.4 | -31.7 | | | | | |
| |
| Adjustments to reconcile net loss to net cash from operating activities: | | | | | | | | |
| Depreciation | 6.0 | 6.3 | 17.7 | | | | | |
| Amortization of intangible assets and capitalized software | 1.5 | 2.8 | 2.8 | | | | | |
| Stock-based compensation | 3.3 | 3.3 | 10.0 | | | | | |
| Impairment charges | | 9.9 | | | | | | |
| Write-off of debt issuance costs | 0.5 | | 0.8 | | | | | |
| Amortization of debt issuance costs | 0.1 | 0.1 | 0.3 | | | | | |
| Amortization of marketable securities | 0.1 | 0.7 | 0.3 | | | | | |
| Gain on sale of marketable securities | 0.0 | | | | | | | |
| Loss on disposal of property and equipment | 0.3 | 0.4 | 0.7 | | | | | |
| Changes in operating assets and liabilities: | | | | | | | | |
| Billed and unbilled accounts receivable, net | 1.3 | -12.6 | 4.7 | | | | | |
| Inventory, net | -2.3 | -3.1 | -2.1 | | | | | |
| Deferred costs and other assets | -0.7 | -1.2 | 0.8 | | | | | |
| Accounts payable | -3.3 | 1.9 | -1.0 | | | | | |
| Accrued expenses and other liabilities | 2.3 | 7.9 | 6.0 | | | | | |
| Deferred revenue | 0.1 | 0.4 | -1.8 | | | | | |
| Net cash (used in) provided by operating activities | -3.0 | -14.4 | 7.8 | | | | | |
| |
| Cash flows from investing activities | | | | | | | | |
| Other | | | | | | | | |
| Changes in restricted cash | 1.1 | 0.2 | -1.6 | | | | | |
| Purchases of marketable securities | | -26.0 | -39.2 | -34.6 | -80.9 | | | |
| Maturities/sales of marketable securities | 27.7 | 31.9 | 32.8 | 39.7 | 48.3 | | | |
| Purchases of property and equipment | -10.4 | -11.0 | -14.9 | | | | | |
| Capitalized software costs | -1.3 | | | | | | | |
| Net cash provided by (used in) investing activities | 17.1 | -5.1 | -24.2 | | | | | |
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| Cash flows from financing activities | | | | | | | | |
| |
| Borrowings under SVB loan facility | | | | | | | | |
| Borrowings under debt facility | | | 10.9 | | | | | |
| Repayment of debt facility | | | -23.4 | | | | | |
| Net cash provided by financing activities | 1.8 | 11.2 | 13.0 | | | | | |
| Effect of exchange rate changes on cash and cash equivalents | 0.0 | | | | | | | |
| Net change in cash and cash equivalents | 15.8 | -8.3 | -3.5 | | | | | |
| Cash and cash equivalents at beginning of period | 7.8 | 16.1 | 19.6 | | | | | |
| Cash and cash equivalents at end of period | 23.6 | 7.8 | 16.1 | | | | | |
| Cash paid for interest | 2.0 | 1.0 | 1.6 | | | | | |
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| Supplemental disclosure of noncash investing and financing activities | | | | | | | | |
| Recording of asset retirement obligation | -0.2 | -0.2 | 0.4 | | | | | |