Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (85,288)	$ (107,294)	$ (153,875)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	25,421	24,588	21,216
Amortization of deferred contract costs	59,654	48,161	32,279
Stock-based compensation	90,022	96,046	81,293
Allowance for credit losses	1,549	1,662	960
Net (accretion) amortization of marketable securities	(8,301)	(7,492)	(896)
Non-cash operating lease expense	4,524	5,856	6,205
Unrealized loss on strategic investments	10,311	1,793	2,896
Other	2,551	1,178	690
Changes in operating assets and liabilities:
Accounts receivable	2,789	10,313	(32,309)
Prepaid expenses and other assets	(4,588)	(5,831)	(4)
Deferred contract costs	(58,333)	(56,890)	(53,379)
Accounts payable, accrued expenses and other liabilities	10,050	(14,429)	(28,620)
Content costs payable	(2,671)	2,967	1,349
Operating lease liabilities	(5,777)	(6,768)	(6,487)
Deferred revenue	11,130	4,135	67,725
Net cash provided by (used in) operating activities	53,043	(2,005)	(60,957)
Cash flows from investing activities:
Purchases of marketable securities	(336,898)	(307,706)	(158,503)
Proceeds from maturities of marketable securities	352,750	295,800	7,500
Purchases of property and equipment	(2,300)	(632)	(1,564)
Capitalized software costs	(12,475)	(12,434)	(14,160)
Purchases of strategic investments	0	0	(5,000)
Payments related to business combinations	0	0	(1,500)
Net cash provided by (used in) investing activities	1,077	(24,972)	(173,227)
Cash flows from financing activities:
Net proceeds from exercise of stock options	2,345	17,911	7,149
Taxes paid related to net share settlement of equity awards	(30,824)	(6,760)	0
Proceeds from share purchases under employee stock purchase plan	7,054	8,044	9,192
Repurchases of common stock	(150,324)	0	0
Payment of deferred offering costs	0	0	(1,586)
Net cash provided by (used in) financing activities	(171,749)	19,195	14,755
Effect of foreign exchange rates on cash flows	(116)	20	(25)
Net decrease in cash, cash equivalents and restricted cash	(117,745)	(7,762)	(219,454)
Cash, cash equivalents and restricted cash—Beginning of period	309,552	317,314	536,768
Cash, cash equivalents and restricted cash—End of period	191,807	309,552	317,314
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	190,592	305,564	313,685
Restricted cash, current	100	3,329	0
Restricted cash, non-current	1,115	659	3,629
Total cash, cash equivalents and restricted cash	191,807	309,552	317,314
Supplemental disclosures of cash flow information:
Interest paid	0	3,188	23
Income taxes paid	1,281	1,418	678
Supplemental disclosure of non-cash investing and financing activities:
Stock-based compensation in capitalized costs	8,504	9,175	5,911
Net change in unrealized gain (loss) on marketable securities	21	289	(213)
Operating lease right-of-use assets exchanged for operating lease liabilities	9,779	0	0
Accrued excise tax on share repurchases	876	0	0
Increase (decrease) in purchases of property and equipment included in liabilities	$ 630	$ (56)	$ 22