Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows from operating activities:
Net loss	$ (87,046)	$ (101,722)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	18,069	15,616
Amortization of deferred contract costs	34,482	22,558
Stock-based compensation	72,928	53,043
Allowance for credit losses	1,309	467
Accretion of marketable securities	(5,323)	(138)
Non-cash operating lease expense	4,468	4,643
Unrealized loss on strategic investments	1,793	2,896
Other	931	460
Changes in operating assets and liabilities:
Accounts receivable	20,363	1,132
Prepaid expenses and other assets	(3,628)	1,375
Deferred contract costs	(45,205)	(40,203)
Accounts payable, accrued expenses and other liabilities	(7,102)	(14,257)
Content costs payable	505	(1,525)
Operating lease liabilities	(5,168)	(5,012)
Deferred revenue	3,887	30,395
Net cash provided by (used in) operating activities	5,263	(30,272)
Cash flows from investing activities:
Purchases of marketable securities	(225,536)	(66,128)
Proceeds from maturities of marketable securities	231,300	0
Purchases of property and equipment	(435)	(1,397)
Capitalized software costs	(9,321)	(10,652)
Purchases of strategic investments	0	(5,000)
Payments related to business combinations	0	(1,500)
Net cash used in investing activities	(3,992)	(84,677)
Cash flows from financing activities:
Net proceeds from exercise of stock options	8,277	5,785
Proceeds from share purchases under employee stock purchase plan	4,757	5,563
Payment of deferred offering costs	0	(1,586)
Net cash provided by financing activities	13,034	9,762
Effect of foreign exchange rates on cash flows	(116)	(38)
Net increase (decrease) in cash, cash equivalents and restricted cash	14,189	(105,225)
Cash, cash equivalents and restricted cash—Beginning of period	317,314	536,768
Cash, cash equivalents and restricted cash—End of period	331,503	431,543
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	327,974	427,914
Restricted cash, current	100
Restricted cash, non-current	3,429	3,629
Total cash, cash equivalents and restricted cash	331,503	431,543
Supplemental disclosures of cash flow information:
Interest paid	3,186	13
Income taxes paid	1,337	516
Supplemental disclosure of non-cash investing and financing activities:
Stock-based compensation in capitalized costs	6,966	4,310
Change in unrealized gain (loss) on marketable securities	$ 218	$ (215)