Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net loss	$ (68,604)	$ (55,753)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	5,456	4,208
Stock-based compensation	47,247	30,506
Amortization of deferred commissions	8,069	5,783
Noncash operating lease costs	4,211	4,990
Amortization of debt discount and issuance costs	3,397	780
Changes in assets and liabilities:
Trade receivables	34,084	26,284
Prepaid expenses and other current assets	821	(970)
Deferred commissions	(8,741)	(7,815)
Other long-term assets	763	(208)
Trade payables	2,317	(469)
Accrued expenses and other short-term liabilities	(5,716)	(1,770)
Deferred revenues	(12,893)	(18,614)
Other long-term liabilities	734	2,244
Net cash provided by (used in) operating activities	11,145	(10,804)
Cash flows from investing activities:
Proceeds from sales and maturities of marketable securities	14,082	27,391
Investment in marketable securities	0	(11,976)
Proceeds from short-term and long-term deposits	70,235	15,101
Investment in short-term and long-term deposits	(50,000)	(65,000)
Purchases of property and equipment	(2,146)	(4,436)
Net cash provided by (used in) investing activities	32,171	(38,920)
Cash flows from financing activities:
Proceeds from follow-on offering, net	500,034	0
Proceeds from employee stock plans, net	3,915	4,814
Proceeds from issuance of convertible senior notes, net of issuance costs	0	245,308
Purchases of capped calls	0	(29,348)
Net cash provided by financing activities	503,949	220,774
Increase in cash and cash equivalents	547,265	171,050
Cash and cash equivalents at beginning of period	234,092	68,929
Cash and cash equivalents at end of period	781,357	239,979
Supplemental disclosure of cash flow information:
Cash paid for income taxes	3,346	810
Net lease liabilities arising from obtaining right-of-use assets	$ 7,895	$ 0