STOCK-BASED COMPENSATION PLANS - Summary of stock-based compensation expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
STOCK-BASED COMPENSATION PLANS
Total stock based compensation expense	$ 2,342	$ 1,630
Excess tax benefit from share based compensation	0	200
Cost of Revenue
STOCK-BASED COMPENSATION PLANS
Total stock based compensation expense	47	56
Sales and marketing expense
STOCK-BASED COMPENSATION PLANS
Total stock based compensation expense	2,104	155
General and administrative
STOCK-BASED COMPENSATION PLANS
Total stock based compensation expense	$ 191	$ 1,419