Quarterly report pursuant to Section 13 or 15(d)

Defined Contribution and Deferred Compensation Plans - Additional Information (Detail)

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Defined Contribution and Deferred Compensation Plans - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Defined Contribution Plan Disclosure [Line Items]    
Silvercrest matching contributions towards benefit of employees $ 22 $ 22
Defined contribution plan, plan name 401(k) savings plan  
Maximum    
Defined Contribution Plan Disclosure [Line Items]    
Silvercrest matching contribution percentage 4.00%