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SHARE-BASED COMPENSATION - Restricted stock units (Details) - Restricted stock units $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares shares
Number of units
Nonvested at the beginning | shares	35,000
Granted | shares	517,000
Vested | shares	(160,000)
Canceled | shares	(350,000)
Nonvested at the end | shares	42,000
Weighted average grant date fair value
Nonvested at the beginning (in dollars per share) | $ / shares	$ 14.01
Granted (in dollars per share) | $ / shares	11.82
Vested (in dollars per share) | $ / shares	24.32
Canceled (in dollars per share) | $ / shares	5.99
Nonvested at the end (in dollars per share) | $ / shares	$ 6.93
Unrecognized compensation expense | $	$ 442
Unrecognized compensation expense, recognition period	1 year 9 months 7 days

X

- Definition

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

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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