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Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2023
Summary of Significant Accounting Policies [Abstract]  
Allowance for Credit Losses
The following table presents our allowance for credit losses activity since December 31, 2022:

Allowance for credit losses, December 31, 2022
  
$
54
  
Charged to costs and expenses
    
–
  
Charged to other accounts
    
–
  
Deductions
    
(4
)
Allowance for credit losses, June 30, 2023
  
$
50
  
Cash, Cash Equivalents and Restricted Cash
The following table provides a reconciliation of cash and cash equivalents, and restricted cash reported within the Unaudited Condensed Consolidated Balance Sheets that sum to the total of the amounts shown in the Unaudited Condensed Statements of Consolidated Cash Flows.

   
June 30,
2023
    
December 31,
2022
  
Cash and cash equivalents
  
$
183
    
$
76
  
Restricted cash
    
94
      
130
  
Total cash, cash equivalents and restricted cash shown in the
  Unaudited Condensed Statements of Consolidated Cash Flows
  
$
277
    
$
206