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	$ (25,649)	$ (17,989)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	4,967	3,069
Amortization of deferred sales commissions	6,582	3,481
Stock-based compensation	13,342	10,512
Provision for doubtful accounts	110	3
Non-cash operating lease expense	1,573
Other	75	0
Changes in operating assets and liabilities:
Accounts receivable	5,371	2,039
Prepaid expenses and other assets	198	(2,738)
Deferred contract costs	(13,038)	(7,956)
Accounts payable, accrued expenses and other liabilities	(21,964)	(16,265)
Content costs payable	(4,355)	(1,986)
Operating lease liabilities	(1,151)
Deferred revenue	19,964	14,072
Net cash used in operating activities	(13,975)	(13,758)
Cash flows from investing activities:
Purchases of property and equipment	(156)	(933)
Capitalized software costs	(3,121)	(3,289)
Purchases of strategic investments	(5,000)	0
Net cash used in investing activities	(8,277)	(4,222)
Cash flows from financing activities:
Net proceeds from exercise of Series A-1 redeemable convertible preferred stock warrants	0	2
Net proceeds from exercise of stock options	1,658	4,489
Payment of redeemable convertible preferred stock issuance costs	0	(2,250)
Payment of deferred offering costs	(1,586)	0
Net cash provided by financing activities	72	2,241
Effect of foreign exchange rates on cash flows	6	0
Net decrease in cash, cash equivalents and restricted cash	(22,174)	(15,739)
Cash, cash equivalents and restricted cash—Beginning of period	536,768	177,931
Cash, cash equivalents and restricted cash—End of period	514,594	162,192
Supplemental disclosures of cash flow information:
Interest paid	2	53
Income taxes paid	64	29
Supplemental disclosure of non-cash investing and financing activities:
Unpaid deferred offering costs	0	58
Stock-based compensation in capitalized costs	1,311	457
Changes in purchases of property and equipment in accounts payable and accrued expenses	$ 523	$ 71