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Balance Sheet Components - Allowance for Doubtful Accounts and Reserve for Subscriber Refunds (Details) - USD ($) $ in Thousands | 12 Months Ended
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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

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