Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net loss	$ (55,753)	$ (47,127)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation	4,208	2,816
Stock-based compensation	30,506	23,757
Amortization of deferred commissions	5,783	7,136
Amortization of operating lease right-of-use asset	4,990	2,837
Amortization of debt discount and issuance costs	780	0
Capital loss from sale of fixed assets	0	24
Changes in assets and liabilities:
Trade receivables	26,284	37,660
Prepaid expenses and other current assets	(970)	(1,904)
Deferred commissions	(7,815)	(8,543)
Other long-term assets	(208)	7
Trade payables	(469)	(321)
Accrued expenses and other short-term liabilities	(1,770)	(4,571)
Deferred revenues	(18,614)	(9,019)
Other long-term liabilities	2,244	201
Net cash provided by (used in) operating activities	(10,804)	2,953
Cash flows from investing activities:
Decrease (increase) in short-term deposits	(49,927)	29,154
Decrease in marketable securities	15,415	3,925
Decrease (increase) in long-term deposits	28	(15)
Proceeds from sale of property and equipment	0	10
Purchases of property and equipment	(4,436)	(9,878)
Net cash provided by (used in) investing activities	(38,920)	23,196
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	4,814
Proceeds (withholdings) from employee stock plans, net		(5,697)
Net cash provided by (used in) financing activities	220,774	(5,697)
Increase in cash and cash equivalents	171,050	20,452
Cash and cash equivalents at beginning of period	68,929	48,707
Cash and cash equivalents at end of period	239,979	69,159
Supplemental disclosure of cash flow information:
Cash paid for income taxes	$ 810	$ 3,146