Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 30,470	$ 50,864
Accounts receivable, net	7,000	6,849
Prepaid expenses and other current assets	6,214	8,139
Total current assets	43,684	65,852
Property and equipment, net	11,447	11,503
Intangible assets, net	13,048	11,273
Goodwill	16,995	11,167
Other assets	1,361	1,457
Total assets	86,535	101,252
Current liabilities
Accounts payable	1,919	2,451
Accrued expenses and other current liabilities	13,245	15,017
Deferred revenue	1,757	2,180
Total current liabilities	16,921	19,648
Deferred tax liability	117	108
Other liabilities	3,473	1,746
Total Liabilities	20,511	21,502
Commitments and contingencies (Note 7)
Stockholders' equity
Common stock, $0.0001 par value. Authorized 100,000 shares; 22,326 issued and 20,671 shares outstanding at June 30, 2017 and 21,407 issued and 19,763 shares outstanding at December 31, 2016	2	2
Additional paid-in capital	518,402	513,139
Treasury stock at cost, 1,655 at June 30, 2017 and 1,644 at December 31, 2016	(35,706)	(35,641)
Accumulated other comprehensive loss	(53)	(112)
Accumulated deficit	(416,621)	(397,638)
Total stockholders' equity	66,024	79,750
Total liabilities and stockholders' equity	$ 86,535	$ 101,252