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 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Class of Stock [Line Items]          
Accumulated deficit $ 634,542   $ 634,542   $ 621,090
Cash and cash equivalents 78,807 $ 81,084 $ 78,807 $ 81,084 86,411
Customer complementary membership period     75 days    
Contractual liabilities 6,886   $ 6,886   7,154
Fulfillment cost 11,200 14,900 23,100 31,900  
Deferred Revenue          
Class of Stock [Line Items]          
Contract with customer, liability, revenue recognized     5,600    
Other Current Liabilities          
Class of Stock [Line Items]          
Contract with customer, liability, revenue recognized     100    
Deferred Revenue          
Class of Stock [Line Items]          
Contractual liabilities 6,900   6,900   $ 7,200
Shipping and Handling          
Class of Stock [Line Items]          
Fulfillment cost 6,600 9,000 13,900 19,400  
Fulfillment Labor          
Class of Stock [Line Items]          
Fulfillment cost $ 2,600 $ 3,400 $ 5,400 $ 7,300  
Cost of Goods and Service, Product and Service Benchmark | Supplier Concentration Risk | Five Suppliers          
Class of Stock [Line Items]          
Concentration risk, percentage 40.00% 50.00% 40.00% 50.00%