Quarterly report pursuant to Section 13 or 15(d)

Receivables, Net - Summary of Receivables (Detail)

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Receivables, Net - Summary of Receivables (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Receivables [Abstract]    
Management and advisory fees receivable $ 3,644 $ 3,780
Unbilled receivables 6,188 5,107
Other receivables 2 2
Receivables 9,834 8,889
Allowance for doubtful receivables (448) (548)
Receivables, net $ 9,386 $ 8,341