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v3.20.4

Debt - Additional Information (Detail) |  | 12 Months Ended |
--- | --- | --- | ---
Mar. 29, 2019 USD ($) Tranche | Dec. 31, 2019 USD ($) | Dec. 31, 2020 USD ($)
Term Loan Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Term loan, face amount | $ 70,000,000 |  |
Number of loan tranches | Tranche | 3 |  |
Debt instrument maturity date | Mar. 01, 2024 |  |
Term Loan Credit Agreement | Two Thousand Nineteen Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument floating interest rate percentage | 1.80% |  |
Effective interest rate | 7.50% |  |
Interest-only payments date | Mar. 01, 2022 |  |
Principal plus declining interest payments | 24 months |  |
Interest only payment period | 12 months |  |
Trailing net revenue target period | 12 months |  |
Term Loan Credit Agreement | Tranche 1 |  |  |
Debt Instrument [Line Items] |  |  |
Term loan, face amount | $ 40,000,000.0 |  |
Term Loan Credit Agreement | Tranche 2 | Two Thousand Nineteen Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Term loan, face amount | 15,000,000.0 |  |
Term Loan Credit Agreement | Tranche 3 | Two Thousand Nineteen Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Loan and security agreement available upon revenue achievement | 15,000,000.0 |  |
Prior Loan Agreement | 2017 Term Loans |  |  |
Debt Instrument [Line Items] |  |  |
Repayments principal and interest aggregate amount | 31,200,000 |  |
Prepayment fees in aggregate amount | 600,000 |  |
Prior Loan Agreement | Interest Expense | 2017 Term Loans |  |  |
Debt Instrument [Line Items] |  |  |
Extinguishment loss recorded |  | $ 2,100,000 |
Revolving Loan Credit Agreement |  |  |
Debt Instrument [Line Items] |  |  |
Term loan, face amount | 5,000,000.0 | $ 5,000,000.0 | $ 8,500,000
Loan and security agreement available upon revenue achievement | $ 10,000,000.0 |  |
Debt instrument floating interest rate percentage | 1.80% |  |
Borrowing limit |  |  | $ 10,000,000.0
Revolving Loan Credit Agreement | Two Thousand Nineteen Term Loan |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument maturity date | Mar. 01, 2024 |  |

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