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Fair Value Measurements - Change in Estimated Fair Value Calculated for Liabilities Valued on Recurring Basis Utilizing Level 3 Inputs (Detail) $ in Thousands | 6 Months Ended
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Jun. 30, 2021 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
Decrease in contingent consideration obligations | $ (74)
Significant Unobservable Inputs (Level 3) [Member] | Contingent Consideration Obligations [Member] |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
Balance at the beginning of the period | 227
Payments | (107)
Decrease in contingent consideration obligations | (74)
Balance at the end of the period | $ 46

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