Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities
Net loss	$ (71,419)	$ (13,732)
Adjustments to reconcile net loss to net cash provided by operating activities
Stock-based compensation	37,209	10,303
Depreciation and amortization	15,147	7,301
Abandonment of long-lived assets		554
Noncash lease expense	2,156	1,866
Unrealized foreign currency (gain) loss, net	(477)	605
Deferred income taxes	(352)	(27)
Changes in operating assets and liabilities
Accounts receivable	34,125	20,723
Deferred contract cost assets	(4,066)	(1,562)
Prepaid expenses and other assets	(4,925)	(4,601)
Accounts payable	339	(3,516)
Accrued expenses and other liabilities	(4,357)	5,115
Deferred revenue	8,774	6,639
Operating lease liabilities	(1,870)	(1,372)
Net cash flow provided by operating activities	10,284	28,296
Investing activities
Purchases of property and equipment	(7,525)	(2,393)
Capitalized software development costs	(7,632)	(2,193)
Purchases of strategic investments	(2,329)
Settlement of post-close working capital adjustments from business combinations	1,291
Net cash flow used in investing activities	(16,195)	(4,586)
Financing activities
Proceeds from stock option exercises	6,907	11,627
Payments of deferred offering costs		(540)
Principal payments under finance lease agreements, net of proceeds from lease incentives	(365)	(314)
Net cash flow provided by financing activities	6,542	10,773
Net increase in cash, cash equivalents and restricted cash	631	34,483
Effect of exchange rate changes on cash	175	(629)
Cash, cash equivalents and restricted cash, beginning of period	589,212	383,253
Cash, cash equivalents and restricted cash, end of period	590,018	417,107
Reconciliation of cash, cash equivalents and restricted cash to the condensed consolidated balance sheets
Cash and cash equivalents	586,914	413,761
Restricted cash, current at end of period included in prepaid expenses and other current assets		242
Restricted cash, non-current at end of period included in other assets	3,104	3,104
Cash, cash equivalents and restricted cash, end of period	590,018	417,107
Supplemental disclosure of cash flow information
Cash paid for interest other than finance leases	38	40
Cash paid for income taxes	98
Cash received for lease incentives	405	93
Operating cash flows from finance leases	511	525
Operating cash flows from operating leases	2,518	1,732
Financing cash flows from finance leases	454	407
Noncash investing and financing activities:
Purchases of property and equipment included in accounts payable and accrued expenses at period end	1,521	399
Capitalized software development costs included in accounts payable and accrued expenses at period end	1,829	591
Deferred offering costs included in accounts payable and accrued expenses at period end	270	2,113
Stock-based compensation capitalized for software development	2,166	83
Conversion of available-for-sale debt securities into equity securities	3,292
Right of use assets obtained in exchange for operating lease liabilities	6,993	76
Noncash net change due to operating lease remeasurement	$ (1,676)	$ (14)