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Stock-Based Compensation (Tables)

6 Months Ended

Jun. 30, 2025

Stock-Based Compensation

Schedule of stock option activity

​

​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​		​	Weighted	​	​	​
​	​	​	​	​		​	Average	​	​	​
​	​	​	​	Weighted-		​	Remaining	​	Aggregate
​	​	​	​	Average		​	Contractual	​	Intrinsic Value
​		Shares		Exercise Price			Term (years)		(in thousands)
Outstanding at December 31, 2024		6,850,889	​	$	13.75		8.31	​	$	2,946
Granted		4,450,300	​	$	6.53	​	​	​	​	​
Cancelled or forfeited		(74,905)	​	$	9.97	​	​	​	​	​
Expired	​	(473)	​	$	682.65	​	​	​	​	​
Outstanding at June 30, 2025	​	11,225,811	​	$	10.89	​	8.56	​	$	447
Vested and exercisable at June 30, 2025	​	3,570,804	​	$	14.39	​	7.22	​	$	302
Vested and expected to vest at June 30, 2025		11,225,811	​	$	10.89	​	8.56	​	$	447

Schedule of stock-based compensation expense

During the three and six months ended June 30, 2025 and 2024, the Company recorded stock-based compensation expense for employee and non-employee stock options and restricted stock, which was allocated as follows in the statements of operations (in thousands):

​

​	​	​	​	​	​	​	​	​	​	​	​	​
​	​	Three Months Ended June 30,					​	Six Months Ended June 30,
​		2025			2024			2025			2024
General and administrative	​	$	2,729	​	$	2,531	​	$	5,266	​	$	4,581
Research and development	​	​	1,622	​	​	920	​		2,924	​		1,624
Total	​	$	4,351	​	$	3,451	​	$	8,190	​	$	6,205

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- References

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

+ References

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-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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- 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.

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