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SHARE-BASED COMPENSATION - Plan (Details) - USD ($) $ in Thousands					3 Months Ended	12 Months Ended
	Aug. 10, 2020	Mar. 27, 2020	Aug. 02, 2019	Feb. 07, 2019	Jun. 30, 2020	Dec. 31, 2020
SHARE-BASED COMPENSATION
Number of shares may be issued to employees, directors, consultants and nonemployee service providers in the form of stock options, stock and stock appreciation rights						10,000,000
Number of shares available for grant						9,700,000
Stock options
SHARE-BASED COMPENSATION
Contractual life						10 years
Stock options | Senior management
SHARE-BASED COMPENSATION
Contractual life	10 years			10 years
Vesting percentage	20.00%			12.50%
Restricted shares | Senior management
SHARE-BASED COMPENSATION
Restricted shares granted (in shares)			39,526	120,000
Grant date fair value			$ 496	$ 1,636
Vesting percentage			20.00%	14.30%
Restricted shares forfeited (in shares)					42,857
Restricted shares | Independent directors
SHARE-BASED COMPENSATION
Restricted shares granted (in shares)		1,903		2,936

X

- Definition

Represents the aggregate fair value of grants made during the period on other than stock option plans.

+ References

No definition available.

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- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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- Definition

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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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

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- Definition

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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- Definition

Percentage of vesting of award under share-based payment arrangement.

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- Definition

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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