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v3.24.1

Summary of Significant Accounting Policies - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2023 USD ($) Segment | Dec. 31, 2022 USD ($)
Significant Accounting Policies [Line Items] |  |
Allowance for doubtful accounts | $ 0 | $ 0
Amortization period description | The amortization period begins with the first month of availability on our service. |
Number of reporting unit | Segment | 1 |
Impairment of goodwill | $ 0 | 0
Impairment of long-lived assets | 0 | 0
Uncertain tax positions | 0 |
Deferred revenue | 15,861,000 | 14,124,000
Revenues | 2,700,000 | 1,600,000
Marketing and advertising costs | 33,100,000 | 30,500,000
Impairment charges on cost method investments | 0 | 0
Defined Contribution Plan 401 (k) [Member] |  |
Significant Accounting Policies [Line Items] |  |
Defined contribution plan annual matching contribution amount | $ 200,000 | $ 300,000
Revenue | Customer Concentration Risk | One Third-Party Platform Partner [Member] |  |
Significant Accounting Policies [Line Items] |  |
Concentration of risk | 15.00% | 14.00%
Accounts Receivable | Customer Concentration Risk | One Third-Party Platform Partner [Member] |  |
Significant Accounting Policies [Line Items] |  |
Concentration of risk | 51.00% | 64.00%
Accounts Receivable | Customer Concentration Risk | Partner Two [Member] |  |
Significant Accounting Policies [Line Items] |  |
Concentration of risk | 26.00% | 16.00%
A La Carte Course Purchase [Member] |  |
Significant Accounting Policies [Line Items] |  |
Assets | $ 0 |
Liabilities | $ 0 |
Website Development Costs and Other Software [Member] |  |
Significant Accounting Policies [Line Items] |  |
Estimated useful life of property and equipment | 3 years |
Minimum [Member] |  |
Significant Accounting Policies [Line Items] |  |
License period or estimated useful life of media library | 12 months |
Voting interests, percentage | 20.00% |
Maximum [Member] |  |
Significant Accounting Policies [Line Items] |  |
License period or estimated useful life of media library | 90 months |

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