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SHARE BASED COMPENSATION - Restricted stock units (Details) - Restricted stock units $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Number of units
Nonvested at the beginning | shares	45,000
Granted | shares	1,000
Vested | shares	(11,000)
Nonvested at the end | shares	35,000
Weighted average grant date fair value
Nonvested at the beginning (in dollars per share) | $ / shares	$ 13.68
Granted (in dollars per share) | $ / shares	24.99
Vested (in dollars per share) | $ / shares	13.86
Nonvested at the end (in dollars per share) | $ / shares	$ 14.01
Unrecognized compensation expense | $	$ 390
Unrecognized compensation expense, recognition period	2 years 11 months 12 days

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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