Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
Dec. 31, 2020 USD ($) Customer Segment	Dec. 31, 2019 USD ($) Customer
Significant Accounting Policies [Line Items]
Allowance for doubtful accounts	$ 0	$ 0
Income tax benefit recognition, minimum percentage of likelihood being realized	50.00%
Number of reportable segments \| Segment	1
Sales and distribution expenses
Significant Accounting Policies [Line Items]
Advertising cost	$ 6,300,000	4,800,000
Shipping and handling cost	20,400,000	17,200,000
Other Expense, Net \| Maximum
Significant Accounting Policies [Line Items]
Net loss from foreign currency transactions	$ (100,000)	$ (100,000)
Customer Concentration Risk \| Revenue Benchmark
Significant Accounting Policies [Line Items]
Number of customer accounted \| Customer	0	0
Customer Concentration Risk \| Revenue Benchmark \| Amazon
Significant Accounting Policies [Line Items]
Percentage of concentration of credit risk	88.00%	95.00%
Customer Concentration Risk \| Accounts Receivable
Significant Accounting Policies [Line Items]
Number of customer accounted \| Customer	0	0
Customer Concentration Risk \| Accounts Receivable \| Amazon
Significant Accounting Policies [Line Items]
Percentage of concentration of credit risk	68.00%	74.00%
Prepaid Expenses and Other Current Assets
Significant Accounting Policies [Line Items]
Restricted cash deposit associated with credit facility	$ 0	$ 300,000
Returned deposit for inventory to pay into an escrow account	3,300,000
Other Noncurrent Assets
Significant Accounting Policies [Line Items]
Restricted cash deposit associated with credit facility	100,000	100,000
Accrued Liabilities
Significant Accounting Policies [Line Items]
Refund liabilities for sales returns	$ 500,000	$ 500,000

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Number of customer accounted for ten percent or more of accounts receivable.

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Number Of Customer Accounted For Ten Percent Or More Of Revenue

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Shipping and Handling Costs.

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Significant Accounting Policies.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Amount of allowance for credit loss on accounts receivable.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of liability for consideration received or receivable from customer which is not included in transaction price, when consideration is expected to be refunded to customer.

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The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

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