CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 402,121	$ 381,742
Marketable securities	106,451	106,214
Accounts receivable, net of allowance for doubtful accounts of $1,210 and $866 at June 30, 2020 and December 31, 2019, respectively	41,470	60,228
Deferred commissions	15,650	14,108
Other receivables	2,630	2,432
Prepaid expenses and other	9,349	6,508
Total current assets	577,671	571,232
Property and equipment, net	38,913	39,745
Operating lease right-of-use assets	17,534	15,352
Deferred commissions, non-current	14,867	14,977
Intangible assets, net	1,622	1,651
Other assets	4,120	3,439
Total assets	654,727	646,396
Current liabilities
Accounts payable	3,813	7,057
Accrued expenses and other current liabilities	56,387	49,930
Deferred revenue	171,378	173,617
Current portion of financing obligations	1,395	1,328
Total current liabilities	232,973	231,932
Convertible senior notes, net	285,011	280,601
Deferred revenue, non-current	29,294	32,569
Other long-term liabilities	1,778	1,498
Operating lease liabilities, non-current	19,274	18,564
Financing obligations, non-current	15,174	15,889
Total liabilities	583,504	581,053
Stockholders’ equity
Preferred stock, $0.001 par value per share, 100,000,000 shares authorized, no shares issued and outstanding	0	0
Additional paid-in-capital	456,007	420,170
Accumulated deficit	(385,499)	(355,161)
Accumulated other comprehensive income	668	287
Total stockholders’ equity	71,223	65,343
Total liabilities and stockholders’ equity	654,727	646,396
Class A Common Stock
Stockholders’ equity
Common stock	39	38
Class B Common Stock
Stockholders’ equity
Common stock	$ 8	$ 9