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STOCK-BASED COMPENSATION PLANS - Summary of stock-based compensation expenses (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
STOCK-BASED COMPENSATION PLANS        
Total stock based compensation expense $ 660 $ 535 $ 967 $ 1,124
Cost of Revenue        
STOCK-BASED COMPENSATION PLANS        
Total stock based compensation expense 7 12 15 27
Sales and marketing expense        
STOCK-BASED COMPENSATION PLANS        
Total stock based compensation expense 69 55 130 114
General, and administrative        
STOCK-BASED COMPENSATION PLANS        
Total stock based compensation expense $ 584 $ 468 $ 822 $ 983