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Accounts Receivable and Contract Assets (Tables)
 12 Months Ended
Dec. 31, 2023
Accounts Receivable and Contract Assets [Abstract]  
Accounts Receivable and Contract Assets
Accounts receivable are summarized in the following table:

 
As of
    
As of
        
   
Dec. 31, 2023
    
Dec. 31, 2022
    
Change
  
                   
Accounts receivable – customers
  
$
8,250
    
$
7,069
    
$
1,181
Other receivables
    
592
      
487
      
105
  
     
8,842
      
7,556
      
1,286
Less: allowance for doubtful accounts
    
(1,005
)
    
(855
)
    
(150
)
Accounts receivable, net
  
$
7,837
    
$
6,701
    
$
1,136
                         
Unbilled revenue
  
$
3,484
    
$
3,290
    
$
194