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Allowance for Credit Losses
 9 Months Ended
Sep. 30, 2023
Receivables [Abstract]  
Allowance for Credit Losses Allowance for Credit Losses
The following table summarizes the financial assets allowance for credit losses (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2023202220232022
Balance at beginning of period$133 $109 $163 $416 
Provision for credit losses— — — — 
Write-offs— — (30)(257)
Adjustment to the existing allowance— — — (50)
Balance at end of period$133 $109 $133 $109 
The following tables summarize accounts receivable by aging category (in thousands):
September 30, 2023
Current31-60 Days61-90 Days91 Days and overTotal over 31 DaysTotal balance
Accounts receivable$6,835 $4,690 $22 $82 $4,794 $11,629 
December 31, 2022
Current31-60 Days61-90 Days91 Days and overTotal over 31 DaysTotal balance
Accounts receivable$28,896 $1,747 $469 $792 $3,008 $31,904