Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities:
Net loss	$ (74,978)	$ (64,114)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	7,319	4,320
Stock-based compensation	49,184	34,779
Amortization of deferred commissions	9,552	10,530
Amortization of operating lease right-of-use asset	7,226	7,009
Amortization of debt discount and issuance costs	2,427	0
Capital loss from sale of fixed assets	0	24
Changes in assets and liabilities:
Trade receivables	14,939	31,357
Prepaid expenses and other current assets	(1,862)	(2,239)
Deferred commissions	(13,172)	(13,401)
Other long-term assets	(250)	50
Trade payables	(379)	379
Accrued expenses and other short-term liabilities	(1,267)	(7,675)
Deferred revenues	(16,943)	(11,749)
Other long-term liabilities	4,708	54
Net cash used in operating activities	(13,496)	(10,676)
Cash flows from investing activities:
Decrease (increase) in short-term deposits	(49,998)	33,474
Decrease (increase) in marketable securities	7,419	(1,627)
Decrease (increase) in long-term deposits	23	(16)
Proceeds from sale of property and equipment	0	10
Purchases of property and equipment	(7,001)	(14,219)
Net cash provided by (used in) investing activities	(49,557)	17,622
Cash flows from financing activities:
Proceeds from issuance of convertible senior notes, net of issuance costs	245,308	0
Purchases of capped calls	(29,348)	0
Proceeds (withholdings) from employee stock plans, net	9,622
Proceeds (withholdings) from employee stock plans, net		(2,669)
Net cash provided by (used in) financing activities	225,582	(2,669)
Increase in cash and cash equivalents	162,529	4,277
Cash and cash equivalents at beginning of period	68,929	48,707
Cash and cash equivalents at end of period	231,458	52,984
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 1,308	$ 3,566