CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 189,988,000	$ 201,075,000
Accounts receivable, net of allowance for doubtful accounts of $302 and $408 at September 30, 2015 and December 31, 2014, respectively	53,299,000	51,061,000
Prefunded coupons cash deposits	626,000	740,000
Deferred tax assets	410,000	457,000
Prepaid expenses and other current assets	5,494,000	2,972,000
Total current assets	249,817,000	256,305,000
Property and equipment, net	26,451,000	25,399,000
Intangible assets, net	9,839,000	11,818,000
Goodwill	29,262,000	29,277,000
Other assets	8,876,000	9,008,000
Total assets	324,245,000	331,807,000
Current liabilities:
Accounts payable	9,461,000	6,358,000
Accrued compensation and benefits	11,560,000	14,861,000
Other current liabilities	17,779,000	15,790,000
Prefunded coupons cash obligations	626,000	740,000
Deferred revenues	7,392,000	6,219,000
Debt obligation	0	7,500,000
Total current liabilities	46,818,000	51,468,000
Other non-current liabilities	18,000	89,000
Deferred rent	683,000	738,000
Deferred tax liabilities	2,121,000	2,624,000
Total liabilities	$ 49,640,000	$ 54,919,000
Commitments and contingencies (Note 12)
Stockholders’ equity:
Preferred stock, $0.00001 par value—10,000,000 shares authorized and no shares issued or outstanding at September 30, 2015 and December 31, 2014
Common stock, $0.00001 par value—250,000,000 shares authorized; 89,042,758 shares issued and 83,232,918 outstanding at September 30, 2015; 86,224,920 shares issued and 81,380,014 outstanding at December 31, 2014	$ 1,000	$ 1,000
Additional paid-in capital	561,187,000	531,018,000
Treasury stock, at cost	(71,176,000)	(61,935,000)
Accumulated other comprehensive loss	(51,000)	(1,000)
Accumulated deficit	(215,356,000)	(192,195,000)
Total stockholders’ equity	274,605,000	276,888,000
Total liabilities and stockholders’ equity	$ 324,245,000	$ 331,807,000