CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS
Cash and cash equivalents	$ 75,134	$ 66,050
Accounts receivable, less allowance for doubtful accounts of $239 and $227, respectively	11,707	10,940
Deferred costs, current	8,288	7,346
Deferred income taxes, current	1,732	1,732
Prepaid expenses and other current assets	2,966	5,443
Total current assets	99,827	91,511
PROPERTY AND EQUIPMENT, net	9,319	7,670
GOODWILL	25,487	25,487
INTANGIBLE ASSETS, net	18,806	20,240
OTHER ASSETS
Deferred costs, net of current portion	3,525	3,202
Deferred income taxes, net of current portion	10,822	10,853
Other non-current assets	202	238
Total assets	167,988	159,201
CURRENT LIABILITIES
Accounts payable	1,650	1,857
Accrued compensation and benefits	6,511	6,038
Accrued expenses and other current liabilities	3,420	1,077
Deferred revenue, current	6,174	5,499
Total current liabilities	17,755	14,471
OTHER LIABILITIES
Deferred revenue, less current portion	8,686	8,312
Deferred rent	2,019	1,601
Total liabilities	28,460	24,384
COMMITMENTS and CONTINGENCIES
STOCKHOLDERS' EQUITY
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 0 shares issued and outstanding
Common stock, $0.001 par value; 55,000,000 shares authorized; 15,141,076 and 14,812,759 shares issued and outstanding, respectively	15	15
Additional paid-in capital	186,869	182,645
Accumulated deficit	(47,356)	(47,843)
Total stockholders' equity	139,528	134,817
Total liabilities and stockholder's equity	$ 167,988	$ 159,201