Income taxes
Provision for income taxes:
The Company incurred net losses for the years ended December 31, 2025 and 2024.
The significant components of income tax expense (benefit) are as follows (in thousands):
Years Ended December 31,
20252024
Current expense / (benefit)
State$(72)$
Foreign239 133 
Total current expense167 135 
Deferred benefit
Federal(98)(65)
Total deferred benefit(98)(65)
Total expense / (benefit)
Federal(98)(65)
State(72)
Foreign239 133 
Total expense$69 $70 
The components of income (loss) before income taxes by tax jurisdiction for the years ended December 31, 2025 and 2024 are as follows (in thousands):
20252024
United States$(117,796)$(104,682)
Foreign2,682 1,646 
Loss before income taxes$(115,114)$(103,036)
The income tax expense for the years ended December 31, 2025 and 2024 primarily relate to state taxes and taxes in foreign jurisdictions, offset by the change in valuation allowance.
The Company adopted ASU 2023-09 for the year ended December 31, 2025 on a prospective basis. A reconciliation between tax expense at the statutory tax rate applicable to income of the Company and the actual tax expense as reported in the consolidated statements of operations is as follows (in thousands, except for percentages):
AmountPercent
Income taxes (benefit) at statutory federal rate$(24,174)21.0 %
State and local taxes, net of federal income tax effect*(57)— 
Foreign tax effects(325)0.3 
Effect of cross-border tax laws
  Global intangible low-taxed income1,462 (1.3)
Tax Credits
  R&D Tax Credits(2,092)1.8 
Changes in valuation allowance24,299 (21.1)
Nontaxable or nondeductible items926 (0.8)
Changes in unrecognized tax benefits523 (0.5)
Other(493)0.4 
Provision (benefit) for income taxes$69 (0.1)%
*The state that contributes to the majority (greater than 50%) of the tax effect in this category is Massachusetts.
The following table is a reconciliation of the U.S. federal statutory income tax rate to the Company’s effective income tax rate for the year ended December 31, 2024, in accordance with the guidance prior to the adoption of ASU 2023-09:
2024
Statutory federal income tax rate21.0 %
State taxes, net of federal benefits0.1 %
Rate Adjustment(2.1)%
Section 162(m) Limitation(1.5)%
Impairment— %
Deemed Foreign Inclusion(0.3)%
Stock Compensation0.1 %
Return-to-provision(2.7)%
Research and development credit2.0 %
Tax Contingencies, net of reversals(0.5)%
Tax Cuts and Jobs Act— %
Change in valuation allowance(16.1)%
Other(0.1)%
Effective Income tax rate(0.1)%
Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of the assets and liabilities for financial reporting purposes and amounts used for income tax purposes.
Significant components of the Company’s deferred income tax assets and liabilities as of December 31, 2025 and 2024 are as follows (in thousands):
20252024
Deferred tax assets:
Net operating losses$76,333 $49,467 
Research and development credits8,926 7,357 
Capitalized research and development expenses25,052 26,904 
Stock-based compensation4,044 3,274 
Lease liability1,024 1,291 
Accrued expenses and other1,402 853 
Gross deferred tax assets116,781 89,146 
Less valuation allowance(106,171)(77,976)
Total deferred tax assets10,610 11,170 
Deferred tax liabilities:
Property and equipment(363)(927)
Intangibles(9,595)(9,475)
Right-of-use lease asset(675)(889)
Gross deferred tax liabilities(10,633)(11,291)
Deferred tax liabilities, net$(23)$(121)
As of December 31, 2025, the Company has federal and state net operating loss carryforwards of approximately $323.5 million and $143.6 million, respectively, to offset against future taxable income. Under the Tax Cuts and Jobs Act of 2017 (“TCJA”), federal net operating losses incurred in 2018 and future years may be carried forward indefinitely, but the deductibility of such federal NOLs is subject to an 80% of taxable income limitation. NOLs generated prior to 2018 are eligible to be carried forward up to 20 years and have no taxable income limitation. The Company has $322.1 million of federal net operating losses that do not expire and $1.4 million that will expire in 2037. State net operating losses can be carried forward for 5 to 20 years depending on the jurisdiction and will begin to expire in years 2039-2045. The company also has Federal research credit carryforwards of approximately $12.0 million that will begin to expire in 2039.
In assessing the realization of deferred tax assets, management considers whether it is more likely than not that some portion or all of the deferred assets will be realized. The ultimate realization of the deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible. Evaluating the need for a valuation allowance for deferred tax assets often requires judgment and analysis of all the positive and negative evidence available, including cumulative losses in recent years and projected future taxable income, to determine whether all or some portion of the deferred tax assets will not be realized. As of December 31, 2025, the Company has recorded a full valuation allowance to offset the net deferred tax assets as the Company believes it is not more likely than not that the net deferred tax assets will be fully realizable. The valuation allowance increased $28.2 million during the year ended December 31, 2025 and $16.7 million during the year ended December 31, 2024.
Under the provisions of the Internal Revenue Code, certain substantial changes in the company's ownership may result in a limitation on the amount of net operating loss carryforwards and research and development credit carryforwards which could be utilized annually to offset future taxable income and taxes payable. We completed a study of our changes in ownership through December 31, 2025 and determined that no material limitations exist on the utilization of the Company’s tax attributes.
The Company maintained undistributed earnings overseas as of December 31, 2025, and the Company believed the funds held by all non-U.S. subsidiaries will be permanently reinvested outside of the U.S. However, if these funds were repatriated to the U.S. or used for U.S. operations, the Company may be subject to withholding taxes in the foreign countries. The Company’s unrepatriated earnings are not subject to federal income tax in the U.S. when distributed.
The following is a reconciliation of the Company’s unrecognized tax benefits (in thousands):
20252024
Balance at January 1$2,564 $2,116 
Additions Based On Tax Positions Related to Current Year477 507 
Additions Based On Prior Tax Positions46 (59)
Balance at December 31$3,087 $2,564 
The Company recognizes the effect of income tax positions only if those positions are more likely than not of being sustained. The Company had unrecognized tax benefits of $3.1 million and $2.6 million as of December 31, 2025 and 2024, respectively.
The Company recognizes penalties and interest related to unrecognized tax benefits as a component of income tax expense. All unrecognized tax benefits would currently not have an impact on the effective rate if recognized. The Company does not anticipate any significant increases or decreases in its uncertain tax positions within the next twelve months.
As of December 31, 2025 the Company’s statutes of limitations are open for all federal and state years filed after the years ended December 31, 2022 and 2021, respectively. Net operating loss and credit carryforwards from all years are subject to examination and adjustments for the three years following the year in which the carryforwards are utilized. The Company is not currently under examination by any taxing authority.
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Historical Timeline

Fiscal YearFiled
2025Mar 24, 2026Showing above
2024Mar 18, 2025
2023Mar 21, 2024
2022Mar 30, 2023
2021Mar 22, 2022

About Income Taxes Disclosures

The income tax disclosure reveals how much a company actually pays in taxes versus what the statutory rate would predict. Analysts focus on the effective tax rate (ETR) reconciliation, which breaks down every item driving the gap between the 21% federal rate and the company's reported ETR — including R&D credits, foreign rate differentials, and state taxes. Deferred tax assets (DTAs) and their valuation allowances signal management's confidence in future profitability: a rising allowance suggests the company doubts it can use accumulated tax benefits. Uncertain tax benefit (UTB) reserves quantify exposure to IRS challenges on aggressive positions.

Key signals to watch: sudden ETR drops without clear operational reasons, large increases in valuation allowances, growing UTB balances, and significant unremitted foreign earnings. Post-TCJA, pay attention to GILTI and BEAT provisions that affect multinational tax structures. Compare the cash taxes paid (from the cash flow statement) against the income tax provision to gauge earnings quality.