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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net loss	$ (18,544)	$ (17,351)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	839	740
Stock-based compensation	2,474	2,296
Amortization of intangible assets	1,964	2,147
Provision for doubtful accounts	106
Other non-cash items	18	48
Changes in assets and liabilities, net of business acquired:
Accounts receivable	371	(54)
Unbilled contracts receivable	95	1,063
Prepaid expenses and other assets	1,031	1,043
Deferred revenue	(589)	(1,101)
Accounts payable	(355)	1,352
Accrued expenses and other liabilities	(289)	(763)
Net cash used in operating activities	(12,879)	(10,580)
Cash flows from investing activities:
Purchases of property and equipment	(349)	(1,274)
Net cash paid for purchase of Prism Circuits, Inc. and MagnaLynx, Inc.	(1,000)	(7,936)
Proceeds from sales and maturities of marketable securities	30,314	49,786
Purchases of marketable securities	(27,712)	(32,968)
Net cash provided by investing activities	1,253	7,608
Cash flows from financing activities:
Proceeds from issuance of common stock	3,207	1,800
Payments on capital lease obligations	(140)	(61)
Net cash provided by financing activities	3,067	1,739
Net decrease in cash and cash equivalents	(8,559)	(1,233)
Cash and cash equivalents at beginning of period	14,340	7,123
Cash and cash equivalents at end of period	$ 5,781	$ 5,890

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