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STOCKHOLDERS' EQUITY - STOCK-BASED COMPENSATION EXPENSE FOR EMPLOYEES AND DIRECTORS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock-Based Compensation Expense
Stock-based compensation expense included in operating expenses	$ 8,001	$ 8,080	$ 6,895
Research and development
Stock-Based Compensation Expense
Stock-based compensation expense included in operating expenses	3,720	3,597	2,337
General and administrative
Stock-Based Compensation Expense
Stock-based compensation expense included in operating expenses	$ 4,281	$ 4,483	$ 4,558

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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+ References

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