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Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 01, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Accounts receivable |  | $ 8,889,000 | $ 10,622,000 |
Allowance for doubtful accounts |  | 1,200,000 | 200,000 |
Bad debt expense (recovery) |  | 1,100,000 | (100,000) |
Earned revenue accrued but not billed |  | 0 | 0 |
Property and equipment impairment |  | 100,000 |  |
Impairment charges on indefinite-lived intangible assets |  | 0 |  |
Impairment charges on finite-lived intangible assets |  |  | 0 |
Restricted cash |  | 1,100,000 | 1,100,000 |
Investment without readily determinable fair value |  | 100,000 | 100,000 |
Advertising cost during the period |  | 900,000 | 900,000 |
Operating lease right-of-use assets |  | 8,668,000 | 9,250,000 |
Operating lease obligation |  | 10,570,000 |  |
Unrecognized Tax Benefits |  | 0 | 0 |
COVID19 |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Accounts receivable |  | 1,200,000 |  |
Allowance for doubtful accounts |  | 1,000,000 |  |
Bad debt expense (recovery) |  | 1,000,000 |  |
Promissory Note Receivable [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Gross financing receivable | $ 900,000 |  |  |
Maturity date of promissory note receivable | Apr. 01, 2019 |  |  |
Effective yield on receivable with imputed interest (interest rate) | 5.10% |  |  |
Promissory note receivable |  |  | 0 |
Trademarks |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Impairment charges on indefinite-lived intangible assets |  |  | 6,200,000 |
Impairment charges on finite-lived intangible assets |  | $ 13,000,000 |  |
Minimum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful lives of property and equipment (in years) |  | 3 years |  |
Estimated useful life of finite-lived intangible asset (in years) |  | 7 years |  |
Maximum |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Estimated useful lives of property and equipment (in years) |  | 7 years |  |
Estimated useful life of finite-lived intangible asset (in years) |  | 18 years |  |
Irrevocable Letter Of Credit [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Restricted cash |  | $ 1,100,000 | $ 1,100,000 |
Restatement Adjustment [Member] | Accounting Standards Update 2016-02 |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Operating lease right-of-use assets |  |  |  | $ 10,400,000
Operating lease obligation |  |  |  | 13,200,000
Accrued rent offset to Operating lease right-of-use assets |  |  |  | $ 2,800,000

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