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v3.20.1

Long-Term Debt - Additional Information (Detail) - USD ($) $ in Thousands |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Feb. 20, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Aug. 01, 2019 | Jul. 31, 2019
Debt Instrument [Line Items] |  |  |  |  |
Net proceeds from the initial term loan |  | $ 74,250 | $ 99,000 |  |
Loan Agreement |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percentage of fee payable upon partial prepayment or maturity |  |  |  | 4.00% | 3.00%
Percentage of capital stock of subsidiaries subject to certain exception | 65.00% |  |  |  |
Debt instrument, covenant daily minimum combined cash and investment balance | $ 15,000 |  |  |  |
Interest expense related to initial term loan |  | $ 16,500 | $ 8,800 |  |
Loan Agreement | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Percentage of repayment premium of principal amount prepaid | 7.00% |  |  |  |
CRG Servicing LLC |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Maximum borrowing capacity | $ 175,000 |  |  |  |
Net proceeds from the initial term loan | $ 173,300 |  |  |  |
Debt interest rate | 9.50% |  |  |  |
Debt instrument interest rate, effective percentage |  | 10.30% |  |  |
Principal amount including interest paid in kind |  | $ 178,600 |  |  |
Debt discount |  | $ 1,400 |  |  |
Debt maturity date | Dec. 31, 2023 | Dec. 31, 2023 |  |  |

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