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Balance Sheet Components - Allowance for Doubtful Accounts and Reserve for Subscriber Refunds (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Allowance for doubtful accounts    
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]    
Balance at the beginning of the year $ 2,094 $ 2,814
Additions — charged to costs and expenses, or contra revenue 54 30
Deductions — recoveries of amounts previously reserved (470) (481)
Deductions — write-offs or refunds (210) (269)
Balance at end of year 1,468 2,094
Reserve for member refunds    
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]    
Balance at the beginning of the year 5,166 4,085
Additions — charged to costs and expenses, or contra revenue 15 1,718
Deductions — recoveries of amounts previously reserved (3,006) 0
Deductions — write-offs or refunds (897) (637)
Balance at end of year $ 1,278 $ 5,166