CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (40,795)	$ (60,708)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	7,980	4,604
Stock-based compensation	44,001	31,191
Other	1,009	(787)
Changes in operating assets and liabilities:
Accounts receivable	7,774	(13,309)
Prepaid expenses and other current assets	(6,690)	820
Deferred commissions	381	(5,089)
Other assets	17,691	(2,386)
Accounts payable and accrued expenses	(3,873)	3,892
Accrued compensation	(8,390)	(5,350)
Deferred revenue	27,075	39,472
Other current and noncurrent liabilities	135	(22)
Net cash provided by (used in) operating activities	46,298	(7,672)
Cash flows from investing activities:
Purchases of property and equipment	(19,073)	(10,262)
Purchases of short-term investments	(157,557)	(179,703)
Sales and maturities of short-term investments	168,175	174,485
Net cash used in investing activities	(8,455)	(15,480)
Cash flows from financing activities:
Proceeds from loan agreement	2,000	0
Principal payments under finance lease obligations	(11)	(12)
Credit facility issuance costs	(333)	0
Proceeds from stock issued in connection with the employee stock purchase plan	13,040	15,129
Proceeds from the exercise of stock options	15,782	15,448
Net cash provided by financing activities	30,478	30,565
Effect of exchange rate changes on cash and cash equivalents and restricted cash	(1,359)	(1,226)
Net increase in cash and cash equivalents and restricted cash	66,962	6,187
Cash and cash equivalents and restricted cash at beginning of period	74,665	165,378
Cash and cash equivalents and restricted cash at end of period	141,627	171,565
Supplemental disclosure of cash flow information:
Cash paid for interest	254	73
Cash paid for income taxes	4,195	1,507
Supplemental cash flow information related to leases:
Operating cash payments for operating leases	$ 3,916	$ 3,297