Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net loss	$ (35,656)	$ (31,430)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	2,349	2,098
Stock-based compensation	21,379	12,883
Amortization of deferred commissions	4,157	3,249
Noncash operating lease costs	2,242	1,960
Amortization of debt discount and issuance costs	1,689	0
Changes in assets and liabilities:
Trade receivables	42,927	36,785
Prepaid expenses and other current assets	(1,673)	342
Deferred commissions	(3,873)	(2,236)
Other long-term assets	900	(82)
Trade payables	(213)	(174)
Accrued expenses and other short-term liabilities	(5,029)	(6,922)
Deferred revenues	(7,618)	(12,603)
Other long-term liabilities	(1,198)	4
Net cash provided by operating activities	20,383	3,874
Cash flows from investing activities:
Increase in short-term deposits	(12,225)	(4,805)
Decrease in marketable securities	6,036	7,794
Decrease in long-term deposits	2,460	34
Purchases of property and equipment	(1,116)	(2,609)
Net cash provided by (used in) investing activities	(4,845)	414
Cash flows from financing activities:
Proceeds from follow-on offering, net	500,034	0
Proceeds from employee stock plans, net	3,942	4,316
Net cash provided by financing activities	503,976	4,316
Increase in cash and cash equivalents	519,514	8,604
Cash and cash equivalents at beginning of period	234,092	68,929
Cash and cash equivalents at end of period	753,606	77,533
Supplemental disclosure of cash flow information:
Cash paid for income taxes	2,822	502
Net lease liabilities arising from obtaining right-of-use assets	$ 7,785	$ 0