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Fair value measurements - Summary of Change in Fair Value of Contingent Consideration (Detail)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning Balance $ 4,004
Preliminary purchase price 8,400
Fair value adjustments (413)
Accretion in value 1,154
Amounts cancelled (1,035)
Amounts paid to sellers (940)
Ending Balance $ 11,170