Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 395,106	$ 183,596
Short-term investments	7,998	204,732
Accounts receivable, net	103,609	125,300
Deferred commissions, current	17,962	24,467
Prepaid expenses and other current assets	38,872	34,940
Total current assets	563,547	573,035
Capitalized software development costs, net	49,341	45,416
Property and equipment, net	35,740	77,254
Operating right-of-use assets	79,838	0
Deferred commissions, non-current	60,500	45,444
Long-term investments	750	1,250
Intangible assets, net	11,534	13,867
Goodwill	47,453	47,453
Other assets, net	1,991	3,437
Total Assets	850,694	807,156
Liabilities:
Accounts payable	15,843	11,921
Accrued expenses	57,685	68,331
Deferred revenue, current	283,878	312,526
Operating lease liabilities, current	11,160	0
Other liabilities	8,178	7,645
Total current liabilities	376,744	400,423
Convertible notes, net	291,038	288,967
Operating lease liabilities, non-current	75,150	0
Other liabilities, non-current	960	2,484
Deferred revenue, non-current	9,405	13,275
Facility financing obligation	0	46,100
Total liabilities	753,297	751,249
Commitments and contingencies (Note 12)
Stockholders’ Equity:
Common stock, $0.0001 par value; 1,000,000 shares authorized, 59,977 and 58,886 shares issued and outstanding at June 30, 2019 and December 31, 2018, respectively	6	6
Additional paid-in capital	637,770	585,387
Accumulated deficit	(542,231)	(529,962)
Accumulated other comprehensive income	1,852	476
Total stockholders’ equity	97,397	55,907
Total Liabilities and Stockholders’ Equity	$ 850,694	$ 807,156