| Summary of Significant Accounting Policies - Deferred revenue, gift cards, and Loyalty Program, including significant changes in deferred revenue (Details) - USD ($) $ in Thousands | 12 Months Ended | |
|---|---|---|
| Dec. 31, 2021 | Dec. 31, 2020 | |
| Information about deferred revenue, gift cards, and Loyalty Program | ||
| Beginning balance | $ 4,615 | $ 1,300 | 
| Sales of gift cards | 838 | 512 | 
| Redemption of gift cards | (458) | (319) | 
| Increase from deferral of revenue | 3,750 | 3,383 | 
| Decrease from revenue recognition | (3,507) | (1,107) | 
| Loyalty Program points earned | 3,194 | 891 | 
| Loyalty Program points redeemed | (1,098) | (45) | 
| Ending balance | $ 7,334 | $ 4,615 | 
| X | ||||||||||
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- Definition The amount of decrease from revenue recognition during the period. No definition available. 
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| X | ||||||||||
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- References No definition available. 
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- Definition The amount of loyalty Program points earned during the period. No definition available. 
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- Definition The amount of loyalty Program points redeemed during the period. No definition available. 
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- Definition The amount of redemption of gift cards during the period. No definition available. 
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- Definition The amount of sales of gift cards during the period. No definition available. 
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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| X | ||||||||||
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- Definition Amount of increase (decrease) in deferred income and obligation to transfer product and service to customer for which consideration has been received or is receivable. Reference 1: http://www.xbrl.org/2003/role/exampleRef 
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