Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Narrative (Details)

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Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Class of Stock [Line Items]          
Accumulated deficit $ 635,878   $ 635,878   $ 621,090
Cash and cash equivalents 50,762 $ 86,094 $ 50,762 $ 86,094 86,411
Customer complementary membership period     75 days    
Contractual liabilities 6,770   $ 6,770   7,154
Fulfillment cost 10,900 13,600 34,000 45,500  
Deferred Revenue          
Class of Stock [Line Items]          
Contract with customer, liability, revenue recognized     6,800    
Other Current Liabilities          
Class of Stock [Line Items]          
Contract with customer, liability, revenue recognized     100    
Shipping and Handling          
Class of Stock [Line Items]          
Fulfillment cost 6,500 8,300 20,400 27,600  
Fulfillment Labor          
Class of Stock [Line Items]          
Fulfillment cost 2,600 $ 3,000 7,900 $ 10,400  
Deferred Revenue          
Class of Stock [Line Items]          
Contractual liabilities $ 6,800   $ 6,800   $ 7,200