Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 229,133	$ 269,670
Short-term investments	739,428	691,834
Accounts receivable — net of allowance for doubtful accounts of $2,786 and $1,584 at March 31, 2020 and December 31, 2019, respectively	81,055	92,517
Deferred commission expense	33,214	32,078
Prepaid expenses and other current assets	29,923	23,625
Total current assets	1,112,753	1,109,724
Long-term investments	66,184	53,776
Property and equipment, net	85,653	83,649
Capitalized software development costs, net	18,826	16,793
Right-of-use assets	230,565	234,390
Deferred commission expense, net of current portion	18,792	19,110
Other assets	12,883	9,824
Intangible assets, net	10,898	11,752
Goodwill	29,956	30,250
Total assets	1,586,510	1,569,268
Current liabilities:
Accounts payable	10,671	12,842
Accrued compensation costs	23,809	26,318
Accrued expenses and other current liabilities	29,450	28,686
Operating lease liabilities	24,542	23,613
Deferred revenue	238,913	231,030
Total current liabilities	327,385	322,489
Operating lease liabilities, net of current portion	239,655	244,216
Deferred revenue, net of current portion	3,334	3,058
Other long-term liabilities	8,898	8,983
Convertible senior notes	346,265	340,564
Total liabilities	925,537	919,310
Commitments and contingencies (Note 9)
Stockholders’ equity:
Common stock	44	44
Additional paid-in capital	1,077,605	1,048,380
Accumulated other comprehensive loss	(830)	(336)
Accumulated deficit	(415,846)	(398,130)
Total stockholders’ equity	660,973	649,958
Total liabilities and stockholders’ equity	$ 1,586,510	$ 1,569,268