CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
OPERATING ACTIVITIES:
Net loss	$ (2,006)	$ (2,061)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Stock-based compensation expense	5,904	5,952
Depreciation	4,215	4,048
Amortization of purchased intangibles	2,133	884
Deferred income taxes and other non-cash tax items	(658)	(1,174)
Provision for doubtful accounts, net	979	0
Changes in operating assets and liabilities:
Accounts receivable	(5,230)	(1,531)
Prepaid expenses and other current assets	(4,599)	(1,524)
Other assets	394	80
Accounts payable	(1,700)	(5,208)
Accrued expenses	(287)	1,553
Deferred revenue	(1,926)	(254)
Other liabilities	(365)	(86)
Net cash (used in) provided by operating activities	(3,146)	679
INVESTING ACTIVITIES:
Purchases of property and equipment, including capitalized software	(4,322)	(4,661)
Investment in technology licenses	(3,174)	0
Acquisition of Synchronite	2,300	0
Acquisition of NexGraph	(125)	0
Acquisition of domains	(27)	(50)
Acquisition costs - Engage, net of cash	0	(79)
Net cash used in investing activities	(9,948)	(4,790)
FINANCING ACTIVITIES:
Excess tax benefit from the exercise of employee stock options	0	135
Proceeds from issuance of common stock in connection with the exercise of options	3,922	2,318
Repurchase of common stock	(12,163)	(26,526)
Net cash used in financing activities	(8,241)	(24,073)
EFFECT OF FOREIGN EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	663	(203)
CHANGE IN CASH AND CASH EQUIVALENTS	(20,672)	(28,387)
CASH AND CASH EQUIVALENTS - Beginning of the period	91,906	103,339
CASH AND CASH EQUIVALENTS - End of the period	71,234	74,952
SUPPLEMENTAL DISCLOSURE OF OTHER CASH FLOW INFORMATION:
Cash paid for income taxes	1,843	118
SUPPLEMENTAL DISCLOSURE OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Contingent earn-out in connection with the acquisition of Synchronite recorded in accrued expenses	1,810	0
Purchase of property and equipment recorded in accounts payable	407	144
Acquisition cost in connection with NexGraph recorded in accrued expenses	$ 250	$ 0