CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash Flows From Operating Activities
Net loss	$ (41,381)	$ (39,963)
Adjustments to reconcile net loss to cash provided by (used in) operating activities:
Depreciation and amortization expense	20,014	15,218
Non-cash operating lease costs	8,610	5,346
Amortization of deferred contract acquisition costs	9,662	6,060
Stock-based compensation expense	33,965	18,042
Amortization of debt discount and issuance costs	1,170	8,971
Net accretion of discounts and amortization of premiums on available-for-sale securities	2,195	1,879
Deferred income taxes	6	(1,513)
Provision for bad debt	968	1,470
Other	113	79
Changes in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(30,775)	(9,211)
Contract assets	(250)	(122)
Deferred contract acquisition costs	(15,608)	(10,866)
Prepaid expenses and other current assets	(6,775)	614
Other noncurrent assets	(85)	1,361
Accounts payable	1,862	6,181
Accrued expenses and other current liabilities	(25,427)	10,119
Operating lease liabilities	(9,455)	(5,352)
Deferred revenue	16,001	14,646
Other noncurrent liabilities	(277)	535
Net cash provided by (used in) operating activities	(35,467)	23,494
Cash Flows From Investing Activities
Purchases of property and equipment	(24,481)	(22,268)
Capitalized internal-use software	(4,453)	(3,445)
Cash paid for acquisitions, net of cash acquired	(4,380)	0
Purchases of available-for-sale securities	(264,541)	(188,377)
Maturities of available-for-sale securities	187,048	261,822
Other investing activities	2	44
Net cash provided by (used in) investing activities	(110,805)	47,776
Cash Flows From Financing Activities
Repayments of convertible senior notes	(16,571)	0
Proceeds from the exercise of stock options	3,006	7,964
Proceeds from the early exercise of stock options	62	95
Repurchases of unvested common stock	(3)	(150)
Payment of tax withholding obligation on RSU settlement	(748)	(530)
Net cash provided by (used in) financing activities	(14,254)	7,379
Net increase (decrease) in cash, cash equivalents, and restricted cash	(160,526)	78,649
Cash, cash equivalents, and restricted cash, beginning of period	320,958	118,146
Cash, cash equivalents, and restricted cash, end of period	160,432	196,795
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest	48	30
Cash paid for income taxes, net of refunds	874	656
Cash paid for operating lease liabilities	8,291	5,174
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Stock-based compensation capitalized for software development	1,109	660
Accounts payable and accrued expenses related to property and equipment additions	16,922	2,827
Vesting of early exercised stock options	841	1,031
Indemnity holdback consideration associated with business combinations	1,275	0
Issuance of common stock related to an acquisition	1,957	0
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 15,966	$ 3,230