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Summary of Significant Accounting Policies and Nature of Operations - Additional Information (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Jan. 01, 2022 USD ($) item | Jan. 02, 2021 USD ($) | Dec. 28, 2019 USD ($) | Jan. 01, 2019 USD ($) | Dec. 29, 2018 USD ($)
Property, Plant and Equipment [Line Items] |  |  |  |  |
Net loss | $ 10,339 | $ 1,513 | $ 31,548 |  |
Trade receivable as percent of total accounts receivable, net | 18.00% | 28.00% |  |  |
Number of suppliers | item | 1 |  |  |  |
Inventory in-transit | $ 3,011 | $ 26,542 |  |  |
Capitalized website and software development costs | 6,334 | 4,769 | 4,907 |  |
Impairment loss on intangible assets | 0 |  |  |  |
Impairment loss on property and equipment | $ 0 | 0 |  |  |
Number of customer accounted for 10 % | 0.00% |  |  |  |
Warranty, coverage period | 30 days |  |  |  |
Warranty, unlimited product replacement, coverage period | 5 years |  |  |  |
Warranty, one-time product replacement, coverage period, option one | 5 years |  |  |  |
Warranty, one-time product replacement, coverage period, option two | 3 years |  |  |  |
Advertising costs | $ 69,102 | 54,588 | 25,691 |  |
Unrecognized tax benefits, interest or penalties | 0 |  |  |  |
Effect of new accounting adoption | $ 95,568 | 83,489 | 12,380 |  | $ 38,822
Minimum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Length Of Fiscal Year | 364 days |  |  |  |
Standard product warranty, recognition period | 1 year |  |  |  |
Maximum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Length Of Fiscal Year | 371 days |  |  |  |
Standard product warranty, recognition period | 5 years |  |  |  |
Website and Software Development |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Capitalized website and software development costs | $ 2,159 | 659 | 55 |  |
Capitalized website and software development cost amount | 14,153 | 22,099 |  |  |
Capitalized website and software development costs accumulated amortization and impairment amount | $ 8,929 | 18,779 |  |  |
Website and Software Development | Minimum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Amortization on a straight-line basis, period | 2 years |  |  |  |
Website and Software Development | Maximum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Amortization on a straight-line basis, period | 3 years |  |  |  |
Cost of Sales |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Freight and shipping expenses | $ 89,785 | 69,925 | 47,140 |  |
Employee Stock Option | Minimum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Stock options vesting period | 3 years |  |  |  |
Employee Stock Option | Maximum |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Stock options vesting period | 4 years |  |  |  |
Accumulated Deficit |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Net loss | $ 10,339 | 1,513 | 31,548 |  |
Effect of new accounting adoption | $ (179,800) | $ (169,461) | $ (167,876) |  | (137,791)
Cumulative Effect Period of Adoption Adjustment |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Effect of new accounting adoption |  |  |  |  | 1,623
Cumulative Effect Period of Adoption Adjustment | Accumulated Deficit |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Effect of new accounting adoption |  |  |  |  | $ 1,623
ASU 2016-02 | Cumulative Effect Period of Adoption Adjustment | Accumulated Deficit |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Effect of new accounting adoption |  |  |  | $ 1,623 |

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