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
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Advances And Loans and Commissions Receivable Allowance For Credit Losses [Line Items]    
Beginning balance $ 563 $ 512
Credit loss (recovery) expense 116 13
Write-offs (60) (50)
Ending balance 619 475
Beginning balance 94  
Credit loss (recovery) expense (91) 42
Write-offs 0 0
Ending balance 3 74
Beginning balance 657  
Credit loss recovery 25 55
Write-offs (60) (50)
Ending balance $ 622 549
Accounting Standards Update 2016-13 [Member]    
Advances And Loans and Commissions Receivable Allowance For Credit Losses [Line Items]    
Beginning balance   32
Beginning balance   $ 544