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Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

Stock Option Activity

The activity for the Company’s 2014 Plan and 2015 Plan, for the three months ended March 31, 2024, is summarized as follows:

		Number of Shares				Weighted- Average Exercise Price				Weighted- Average Remaining Contractual Life (in years)				Aggregate Intrinsic Value ($000)
Outstanding — December 31, 2023			1,867,795			$	10.72				6.10			$	184
Granted			862,060			$	1.86
Forfeited/Cancelled			(13,253	)		$	7.84
Outstanding — March 31, 2024			2,716,602			$	7.92				7.11			$	—
Exercisable — March 31, 2024			1,389,304			$	13.35				4.99			$	—
Vested or expected to vest — March 31, 2024			2,716,602			$	7.92				7.11			$	—

Schedule of Restricted Stock Units ("RSU") Activity

Restricted stock unit (“RSU”) activity under the 2014 Plan and 2015 Plan for the three months ended March 31, 2024, is summarized as follows:

		Number of Shares				Weighted Average Grant Date Fair Value Per Share
Non-vested at December 31, 2023			1,886,374			$	2.28
Granted			1,877,940			$	1.88
Vested			(553,182	)		$	3.03
Forfeited			(9,120	)		$	2.15
Non-vested at March 31, 2024			3,202,012			$	1.91

Stock-Based Compensation Expense Related to Stock Options

Stock-based compensation expense related to stock options is included in the following line items in the accompanying unaudited condensed consolidated statements of operations (in thousands):

		Three Months Ended March 31,
		2024				2023
Research and development		$	195			$	374
Selling, general and administrative			510				333
Total		$	705			$	707

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

+ References

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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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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-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

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