Quarterly report pursuant to Section 13 or 15(d)

REVENUE - Accounts Receivable (Details)

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REVENUE - Accounts Receivable (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Accounts receivable, net:    
Total accounts receivable, net $ 9,088 $ 15,143
Technical services    
Accounts receivable, net:    
Total accounts receivable, net 1,844 3,072
Professional services    
Accounts receivable, net:    
Total accounts receivable, net 7,094 11,829
Other    
Accounts receivable, net:    
Total accounts receivable, net $ 150 $ 242