CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
OPERATING ACTIVITIES:
Net loss	$ (794)	$ (232)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	2,697	3,051
Depreciation	1,981	2,050
Amortization of purchased intangibles	1,058	418
Deferred income taxes and other non-cash tax items	(76)	352
Provision for doubtful accounts, net	271	0
Changes in operating assets and liabilities:
Accounts receivable	48	(798)
Prepaid expenses and other current assets	(3,930)	(2,600)
Other assets	460	24
Accounts payable	1,114	(1,550)
Accrued expenses	(3,828)	(1,580)
Deferred revenue	(1,586)	220
Other liabilities	(414)	(11)
Net cash used in operating activities	(2,999)	(656)
INVESTING ACTIVITIES:
Purchases of property and equipment, including capitalized software	(1,456)	(1,664)
Investment in technology licenses	(3,174)	0
Acquisition of NexGraph	(125)	0
Acquisition of domains	0	(50)
Net cash used in investing activities	(4,755)	(1,714)
FINANCING ACTIVITIES:
Proceeds from issuance of common stock in connection with the exercise of options	2,978	1,347
Repurchase of common stock	(7,841)	(7,428)
Net cash used in financing activities	(4,863)	(6,081)
EFFECT OF FOREIGN EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	84	(55)
CHANGE IN CASH AND CASH EQUIVALENTS	(12,533)	(8,506)
CASH AND CASH EQUIVALENTS - Beginning of the period	91,906	103,339
CASH AND CASH EQUIVALENTS - End of the period	79,373	94,833
SUPPLEMENTAL DISCLOSURE OF OTHER CASH FLOW INFORMATION:
Cash paid for income taxes	1,037	34
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchase of property and equipment recorded in accounts payable	1,174	1,648
Acquisition cost in connection with NexGraph recorded in accrued expenses	$ 375	$ 0