SHARE BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2022

SHARE BASED COMPENSATION

Summary of stock option-based compensation expense

In Thousands of US Dollars
Functional Expense Category	2022		2021		2020
General and administrative expense	$	417	$	2,124	$	702
Research and development expense		175		479		1,046
Total	$	592	$	2,603	$	1,748