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ORDINARY SHARE AND SHARE INCENTIVE PLANS - Significant Ranges of Outstanding and Exercisable Stock Options (Details)	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Options exercisable and vested and expected to vest at the end of the period
Number of options exercisable (in shares) | shares	315,261
Number of options vested and expected to vest (in shares) | shares	1,455,418
Weighted-average exercise price per share of options exercisable (in dollars per share)	$ 1.23
Weighted-average exercise price per share of options vested and expected to vest (in dollars per share)	1.12
Exercise Price Range from Dollars 1.07 to 1.07
Exercise Price Range
Exercise price, low end of range (in dollars per share)	1.07
Exercise price, high end of range (in dollars per share)	$ 1.07
Stock Options Outstanding
Number of shares outstanding (in shares) | shares	849,890
Weighted-average remaining contractual life	6 years 11 months 1 day
Weighted-average exercise price per share (in dollars per share)	$ 1.07
Exercise Price Range from Dollars 1.14 to 1.14
Exercise Price Range
Exercise price, low end of range (in dollars per share)	1.14
Exercise price, high end of range (in dollars per share)	$ 1.14
Stock Options Outstanding
Number of shares outstanding (in shares) | shares	580,528
Weighted-average remaining contractual life	5 years 11 months 1 day
Weighted-average exercise price per share (in dollars per share)	$ 1.14
Stock Options Exercisable
Number of shares Exercisable (in shares) | shares	290,261
Weighted-average exercise price per share (in dollars per share)	$ 1.14
Exercise Price Range from Dollars 2.24 to 2.24
Exercise Price Range
Exercise price, low end of range (in dollars per share)	2.24
Exercise price, high end of range (in dollars per share)	$ 2.24
Stock Options Outstanding
Number of shares outstanding (in shares) | shares	25,000
Weighted-average remaining contractual life	5 months 12 days
Weighted-average exercise price per share (in dollars per share)	$ 2.24
Stock Options Exercisable
Number of shares Exercisable (in shares) | shares	25,000
Weighted-average exercise price per share (in dollars per share)	$ 2.24

X

- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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