CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net loss	$ (11,681)	$ (11,153)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	562	530
Stock-based compensation	1,553	1,463
Amortization of intangible assets	1,309	1,469
Provision for doubtful accounts	106
Other non-cash items	18	27
Changes in assets and liabilities, net of business acquired:
Accounts receivable	427	(1,268)
Unbilled contracts receivable	25	1,130
Prepaid expenses and other assets	828	776
Deferred revenue	(75)	(540)
Accounts payable	(609)	(55)
Accrued expenses and other liabilities	251	856
Net cash used in operating activities	(7,286)	(6,765)
Cash flows from investing activities:
Purchases of property and equipment	(316)	(455)
Net cash paid for purchase of MagnaLynx, Inc.	(1,000)	(3,384)
Proceeds from sales and maturities of marketable securities	16,873	32,898
Purchases of marketable securities	(20,563)	(23,541)
Net cash (used in) provided by investing activities	(5,006)	5,488
Cash flows from financing activities:
Proceeds from issuance of common stock	2,465	1,467
Payments on capital lease obligations	(93)	(41)
Net cash provided by financing activities	2,372	1,426
Net (decrease) increase in cash and cash equivalents	(9,920)	149
Cash and cash equivalents at beginning of period	14,340	7,123
Cash and cash equivalents at end of period	$ 4,420	$ 7,272