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DETAILS OF SELECTED BALANCE SHEET ACCOUNTS - Accounts Receivable (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total accounts receivable $ 122,584 $ 115,220
Allowance for credit losses (304) (361)
Total accounts receivable, net 122,280 114,859
Trade    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total accounts receivable 69,833 75,740
Unbilled revenue    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total accounts receivable 51,567 38,508
Other    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total accounts receivable $ 1,184 $ 972