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	$ (55,029)	$ (29,380)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	10,200	6,457
Amortization of deferred sales commissions	13,965	7,233
Stock-based compensation	28,074	16,484
Provision for doubtful accounts	517	170
Non-cash operating lease expense	3,101	0
Other	252	0
Changes in operating assets and liabilities:
Accounts receivable	3,356	3,325
Prepaid expenses and other assets	1,243	(3,928)
Deferred contract costs	(27,381)	(15,724)
Accounts payable, accrued expenses and other liabilities	(22,034)	(10,448)
Content costs payable	(2,652)	(1,271)
Operating lease liabilities	(3,146)	0
Deferred revenue	33,099	21,596
Net cash used in operating activities	(16,435)	(5,486)
Cash flows from investing activities:
Purchases of property and equipment	(699)	(3,111)
Capitalized software costs	(6,643)	(6,680)
Purchases of strategic investments	(5,000)	0
Net cash used in investing activities	(12,342)	(9,791)
Cash flows from financing activities:
Net proceeds from exercise of stock options	3,831	6,004
Proceeds from share purchases under employee stock purchase plan	5,563	0
Payment of redeemable convertible preferred stock issuance costs	0	(2,250)
Payment of deferred offering costs	(1,586)	(313)
Net proceeds from exercise of Series A-1 redeemable convertible preferred stock warrants	0	3
Net cash provided by financing activities	7,808	3,444
Effect of foreign exchange rates on cash flows	(4)	0
Net decrease in cash, cash equivalents and restricted cash	(20,973)	(11,833)
Cash, cash equivalents and restricted cash—Beginning of period	536,768	177,931
Cash, cash equivalents and restricted cash—End of period	515,795	166,098
Supplemental disclosures of cash flow information:
Interest paid	10	57
Income taxes paid	388	333
Supplemental disclosure of non-cash investing and financing activities:
Unpaid deferred offering costs	0	1,903
Stock-based compensation in capitalized costs	2,646	973
Changes in purchases of property and equipment in accounts payable and accrued expenses	$ 29	$ 721