Quarterly report pursuant to Section 13 or 15(d)

Notes Receivable from Partners - Schedule of Notes Receivable from Partners (Detail)

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Notes Receivable from Partners - Schedule of Notes Receivable from Partners (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]      
Interest accrued and capitalized on notes receivable $ 2 $ 3  
Partners      
Accounts Notes And Loans Receivable [Line Items]      
Beginning balance 645 $ 924 $ 924
Repayment of notes (300)   (291)
Interest accrued and capitalized on notes receivable 2   12
Ending balance $ 347   $ 645