CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash Flows From Operating Activities
Net loss	$ (104,918)	$ (75,473)
Adjustments to reconcile net loss to cash provided by operating activities:
Depreciation and amortization expense	45,352	31,245
Non-cash operating lease costs	18,106	11,004
Amortization of deferred contract acquisition costs	20,218	12,915
Stock-based compensation expense	88,780	38,589
Amortization of debt discount and issuance costs	2,332	18,154
Net accretion of discounts and amortization of premiums on available-for-sale securities	3,798	3,864
Deferred income taxes	(1,833)	(6,616)
Provision for bad debt	2,010	2,009
Other	264	84
Changes in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net	(26,947)	(14,363)
Contract assets	(1,116)	(1,711)
Deferred contract acquisition costs	(30,604)	(25,326)
Prepaid expenses and other current assets	(5,067)	(1,465)
Other noncurrent assets	371	1,590
Accounts payable	8,174	6,767
Accrued expenses and other current liabilities	(30,479)	10,936
Operating lease liabilities	(20,523)	(10,371)
Deferred revenue	34,477	27,721
Other noncurrent liabilities	389	1,396
Net cash provided by operating activities	2,784	30,949
Cash Flows From Investing Activities
Purchases of property and equipment	(61,565)	(35,840)
Capitalized internal-use software	(10,034)	(7,103)
Cash paid for acquisitions, net of cash acquired	(86,941)	0
Purchases of available-for-sale securities	(422,374)	(381,205)
Maturities of available-for-sale securities	414,036	514,344
Other investing activities	25	50
Net cash provided by (used in) investing activities	(166,853)	90,246
Cash Flows From Financing Activities
Repayments of convertible senior notes	(16,571)	0
Proceeds from the exercise of stock options	5,977	11,519
Proceeds from the early exercise of stock options	62	95
Repurchases of unvested common stock	(3)	(169)
Proceeds from the issuance of common stock for employee stock purchase plan	8,688	7,174
Payment of tax withholding obligation on RSU settlement	(1,264)	(1,090)
Net cash provided by (used in) financing activities	(3,111)	17,529
Net increase (decrease) in cash, cash equivalents, and restricted cash	(167,180)	138,724
Cash, cash equivalents, and restricted cash, beginning of period	320,958	118,146
Cash, cash equivalents, and restricted cash, end of period	153,778	256,870
Supplemental Disclosure of Cash Flow Information:
Cash paid for interest	642	2,186
Cash paid for income taxes, net of refunds	990	942
Cash paid for operating lease liabilities	16,761	10,361
Supplemental Disclosure of Non-cash Investing and Financing Activities:
Stock-based compensation capitalized for software development	2,656	1,542
Accounts payable and accrued expenses related to property and equipment additions	35,217	19,342
Vesting of early exercised stock options	1,560	2,052
Indemnity holdback consideration associated with business combinations	10,582	0
Issuance of common stock related to an acquisition	65,504	0
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 17,537	$ 11,605