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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of income tax benefit at the statutory federal income tax rate and income taxes as reflected in the consolidated financial statements is as follows:

​	​	​	​	​	​
​	​	Years Ended December 31,
​		2024		2023
Federal tax benefit at statutory rate		(21.0)	%	(21.0)	%
State and local tax, net of federal benefit		(8.0)		(8.5)	​
State and local tax rate change		3.1		1.6	​
Permanent differences		0.1		0.4	​
Research and development		(5.8)		(0.9)	​
Change in valuation allowance		33.0		28.4	​
Other		(1.4)		—	​
Total provision		—	%	—	%

Schedule of Deferred Tax Assets for Federal Income Taxes

Significant components of the Company’s deferred tax assets for federal income taxes consisted of the following (in thousands):

​	​	​	​	​	​	​
​	​	December 31,
​		2024			2023
Deferred tax assets		​			​
Net operating losses	​	$	87,742	​	$	72,689
Capitalized research and development costs, net of amortization	​		35,608	​		33,778
Research and development credits	​		13,269	​		9,746
Start-up costs	​		4,051	​		4,407
Deferred revenue	​		12,182	​		13,353
Lease liability	​		733	​		668
Accrued compensation	​		405	​		—
Amortizable assets and other	​		27	​		21
Equity compensation	​		1,115	​		87
Gross deferred tax assets	​		155,132	​		134,749
Valuation allowance	​		(153,855)	​		(133,580)
Deferred tax assets, net of valuation allowance	​		1,277	​		1,169
Deferred tax liabilities	​			​
Right of use asset	​		(848)	​		(645)
Depreciation	​		(429)	​		(524)
Deferred tax liabilities	​		(1,277)	​		(1,169)
Net deferred tax assets and liabilities	​	$	—	​	$	—

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- References

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- Definition

Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-2

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- Definition

Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 231
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482663/740-10-55-231

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12A

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-12

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