CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 139,074	$ 137,588
Accounts receivable, net	25,624	19,163
Inventory	902	2,317
Prepaid expenses and other current assets	12,949	11,978
Total current assets	178,549	171,046
Property and equipment, net	27,489	28,160
Goodwill	9,393	9,393
Acquired intangibles, net	3,011	3,266
Other assets	3,150	2,948
Total assets	221,592	214,813
Current liabilities
Accounts payable	2,798	5,196
Accrued liabilities	41,574	34,702
Current portion of capital lease obligation	276	269
Current portion of long-term debt	3,750	3,750
Deferred revenue	39,032	36,657
Total current liabilities	87,430	80,574
Long-term debt	13,903	14,840
Sales tax liability	3,670	3,670
Capital lease obligation	86	181
Other long-term liabilities	5,374	5,416
Total liabilities	$ 110,463	$ 104,681
Commitments and contingencies (Note 8)
Stockholders' equity
Common stock	$ 7	$ 7
Additional paid-in capital	326,860	319,792
Accumulated other comprehensive income	1,069	527
Accumulated deficit	(216,807)	(210,194)
Total stockholders' equity	111,129	110,132
Total liabilities and stockholders' equity	$ 221,592	$ 214,813