Fair Value Measurements - Assets Carried at Fair Value and Measured on Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] $ in Thousands	Dec. 31, 2019 USD ($)
Assets:
Total assets	$ 4,887
Liabilities:
Total liabilities	979
Short-Term Investments [Member]
Assets:
Total assets	4,887
Contingent Consideration - Current [Member]
Liabilities:
Total liabilities	613
Contingent Consideration - Non-current [Member]
Liabilities:
Total liabilities	366
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Total assets	4,887
Significant Other Observable Inputs (Level 2) [Member] | Short-Term Investments [Member]
Assets:
Total assets	4,887
Significant Unobservable Inputs (Level 3) [Member]
Liabilities:
Total liabilities	979
Significant Unobservable Inputs (Level 3) [Member] | Contingent Consideration - Current [Member]
Liabilities:
Total liabilities	613
Significant Unobservable Inputs (Level 3) [Member] | Contingent Consideration - Non-current [Member]
Liabilities:
Total liabilities	$ 366