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Share-based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Non-cash, Share-based Compensation Expense

For the three and six month periods ended June 30, 2022 and 2021, 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,
	2022				2021				2022				2021
Research and development	$	51			$	38			$	92			$	74
General and administrative		121				95				247				200
Total	$	172			$	133			$	339			$	274

Summary of Stock Option Activities

Stock option transactions for the six month period ended June 30, 2022 under the Company’s stock incentive plans were as follows:

	Number of Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (in years)
Options outstanding at December 31, 2021		904,123			$	5.59				9.18
Granted		12,000				2.27
Exercised	—				—
Forfeited and cancelled		(35,608	)			3.08
Options outstanding at June 30, 2022		880,515			$	5.65				8.69
Options exercisable at June 30, 2022		288,179			$	10.31				8.23
Options vested and expected to vest		879,512			$	5.65				8.69

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- References

No definition available.

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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

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 (h)(1)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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- Definition

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.

+ 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 (d)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

Reference 3: 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)
-URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901

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