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Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Non-cash, Share-based Compensation Expense

For the three and six months ended June 30, 2023 and 2022, the Company recognized the following non-cash, share-based compensation expense in the statements of operations (in thousands):

	Three Months Ended June 30,								Six Months Ended June 30,
	2023				2022				2023				2022
Research and development	$	42			$	51			$	83			$	92
General and administrative		145				121				308				247
Total	$	187			$	172			$	391			$	339

Summary of Stock Option Activities

Stock option transactions for the six months ended June 30, 2023 under the Company’s stock incentive plans were as follows:

		Options Outstanding
		Number of Options				Weighted Average  Exercise Price				Weighted Average Remaining Contractual Term  (in years)
Options outstanding - December 31, 2022			704,960			$	5.62				8.29
Granted			—				—
Exercised			—				—
Forfeited and cancelled			(85,178	)			5.80
Options outstanding - June 30, 2023			619,782			$	5.60				7.82
Options exercisable - June 30, 2023			367,516			$	7.25				7.62
Options vested and expected to vest			619,689			$	5.60				7.82

Summary of Stock Award Transactions under Stock Incentive Plans

Stock award transactions for the six months ended June 30, 2023 under the Company’s stock incentive plans were as follows:

		Restricted Stock Units Outstanding
		Number of Shares				Weighted Average Grant Date Fair Value
RSUs outstanding - December 31, 2022			91,000			$	2.21
Granted			—				—
Vested and released			—				—
Forfeited and cancelled			—				—
RSUs outstanding - June 30, 2023			91,000			$	2.21

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- Definition

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.

+ References

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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 of the changes in outstanding nonvested restricted stock units.

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