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STOCK-BASED COMPENSATION - Stock-based compensation expenses (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
STOCK-BASED COMPENSATION
Stock compensation in continuing operations	$ 79,000	$ 372,000
Stock compensation in discontinued operations		288,000
Total stock compensation expenses	79,000	660,000
Research and development
STOCK-BASED COMPENSATION
Stock compensation in continuing operations	6,000	151,000
General and administrative
STOCK-BASED COMPENSATION
Stock compensation in continuing operations	$ 73,000	$ 221,000

X

- Definition

Line items represent stock-based compensation.

+ References

No definition available.

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- Definition

Amount of expense for Stock compensation in continuing operations.

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- Definition

Amount of expense for Stock compensation in discontinued operations.

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 14.F)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479830/718-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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