Quarterly report pursuant to Section 13 or 15(d)

Selected Balance Sheet Data - Schedule of Advances and Loans, Net (Detail)

v3.21.2
Selected Balance Sheet Data - Schedule of Advances and Loans, Net (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Advances And Loans and Commissions Receivable Allowance For Credit Losses [Line Items]    
Beginning balance $ 563 $ 512
Credit loss recovery (53) (79)
Write-offs (36) (32)
Ending balance 474 401
Beginning balance 94  
Credit loss recovery (84) 1
Write-offs 0 0
Ending balance 10 33
Beginning balance 657  
Credit loss recovery (137) (78)
Write-offs (36) (32)
Ending balance $ 484 434
Accounting Standards Update 2016-13 [Member]    
Advances And Loans and Commissions Receivable Allowance For Credit Losses [Line Items]    
Beginning balance   32
Beginning balance   $ 544