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Share-based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Schedule of share-based compensation expense

The following table provides share-based compensation reflected in the Company’s condensed consolidated statements of operations and comprehensive loss for the three and six months ended June 30, 2024 and 2023 (in thousands):

		Three Months Ended June 30,								Six Months Ended June 30,
		2024				2023				2024				2023
Research and development		$	24			$	181			$	50			$	410
General and administrative			160				198				315				395
		$	184			$	379			$	365			$	805

Schedule of stock option activity

A summary of stock option activity (excluding market-based stock options) for the six months ended June 30, 2024, is as follows:

										Weighted
						Weighted				Average				Average
						Average				Remaining				Intrinsic
		Number				Exercise				Contractual				Value (in
		of Options				Price				Term (Years)				thousands)
Outstanding as of December 31, 2023			291,368			$	189.09				4.6			$	—
Granted			—				—
Exercised			—				—
Cancelled or forfeited			(7,518	)			198.52
Outstanding as of June 30, 2024			283,850			$	188.84				4.2			$	—
Exercisable at June 30, 2024			250,429			$	206.52				3.9			$	—

Summary of RSA activity

A summary of RSA activity for the six months ended June 30, 2024 is as follows:

						Weighted Average
		Number				Grant Date
		of Shares				Fair Value
Unvested as of December 31, 2023			170,937			$	2.28
Granted			65,000				3.35
Vested			(41,715	)			2.68
Forfeited			—				—
Unvested as of June 30, 2024			194,222			$	2.55

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Tabular disclosure of the changes in outstanding nonvested restricted stock shares.

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-Name Accounting Standards Codification
-Section 50
-Subparagraph (c)
-Paragraph 2
-SubTopic 10
-Topic 718
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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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-Subparagraph (c)(1)
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