SHARE-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Stock options
Expected term	10 years
Vesting period	48 months
Stock-based compensation (in dollars)	$ 56	$ 52
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	0
Stock Options
Stock options
Stock-based compensation (in dollars)	$ 48	28
Restricted Securities
Stock options
Vesting period	3 years
Stock-based compensation (in dollars)	$ 25	$ 8
2010 Plan
Stock options
Expected term	10 years
2015 Plan
Stock options
Shares available for future grants	110,628
Shares authorized for issuance	51,661
Expected term	10 years

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Net number of non-option equity instruments granted to participants.

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Number of shares authorized for issuance under share-based payment arrangement.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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