Note 18. Income Taxes

Loss from continuing operations before provision for income taxes was attributed to the following jurisdictions for the years ended December 31, 2025, 2024 and 2023 (in thousands):

Years Ended December 31, 

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2023

United States

$

(28,201)

$

(65,787)

$

(66,821)

Foreign

 

(3,969)

 

(38,562)

 

(17,393)

$

(32,170)

$

(104,349)

$

(84,214)

The provision for income taxes consists of the following for the years ended December 31, 2025, 2024 and 2023 (in thousands):

Years Ended December 31, 

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2023

Current:

 

  ​

 

  ​

 

  ​

Federal

$

$

$

State

 

79

 

59

 

73

Foreign

 

1,470

 

1,004

 

1,801

Total current expense

 

1,549

 

1,063

 

1,874

Deferred:

 

  ​

 

  ​

 

  ​

Federal

 

96

 

(200)

 

(278)

State

 

86

 

(126)

 

(423)

Foreign

 

68

 

(378)

 

(828)

Total deferred expense

 

250

 

(704)

 

(1,529)

Total provision for income taxes

$

1,799

$

359

$

345

Significant components of the Company’s deferred tax assets and liabilities as of December 31, 2025 and 2024 are shown below (in thousands):

December 31, 

  ​ ​ ​

2025

  ​ ​ ​

2024

Deferred tax assets:

 

  ​

 

  ​

Net operating loss carryforward

$

46,233

$

51,707

Expenses recognized for granting of options and warrants

 

3,853

 

5,391

Interest expense

 

1,022

 

430

Unrealized losses

 

2,390

 

5,165

Capitalized research & experimentation

 

385

 

7,026

R&D tax credit

 

7,056

 

4,062

Accrued expenses and reserves

 

2,648

 

1,344

Intangibles

1,709

2,140

Goodwill

8,383

9,420

Lease liability

 

9,033

 

8,758

Total deferred tax assets

 

82,712

 

95,443

Valuation allowance

 

(74,184)

 

(86,595)

$

8,528

$

8,848

Deferred tax liabilities:

 

  ​

 

  ​

Right-of-use assets

$

(8,230)

$

(8,321)

Unremitted foreign earnings

 

(579)

 

(489)

Total deferred tax liability

 

(8,809)

 

(8,810)

Net deferred tax liability

$

(281)

$

38

Our net deferred tax liability as presented in our consolidated balance sheet consists of the following items (in thousands):

December 31, 

  ​ ​ ​

2025

  ​ ​ ​

2024

Deferred tax assets

$

1,073

$

842

Deferred tax liabilities

 

(1,354)

 

(804)

Net deferred tax liability

$

(281)

$

38

The Company has recorded a net deferred tax liability in jurisdictions where taxable temporary differences from indefinite-lived intangible assets do not support the realization of deferred tax assets which have finite carryover periods. In addition, the Company has recorded a net deferred tax liability in jurisdictions where taxable temporary differences exceed deductible temporary differences.

The provision for (benefit from) income taxes differs from that computed using the federal statutory rate applied to loss from continuing operations before provision for income taxes for the year ended December 31, 2025 as follows (in thousands):

December 31, 2025

Computed tax benefit at federal statutory rate

$

(6,756)

21.00%

State and local income tax, net of federal income tax effect

 

130

(0.40)%

Foreign tax effects

 

Change in France valuation allowance

1,010

(3.14)%

Change in Belgium valuation allowance

 

1,421

(4.42)%

Other

 

(59)

0.18%

Tax credits

R&D tax credit

 

(963)

3.00%

Change in valuation allowance

501

(1.56)%

Non-taxable or non-deductible items

626

(1.94)%

Changes in unrcognized tax benefits

28

(0.09)%

Other

Deferred tax true-ups

 

1,724

(5.36)%

Expired NOL under IRC Section 382

4,137

(12.86)%

$

1,799

(5.59)%

The provision for (benefit from) income taxes differs from that computed using the federal statutory rate applied to loss from continuing operations before provision for income taxes for the years ended December 31, 2024 and 2023 as follows (in thousands):

December 31, 

  ​ ​ ​

2024

  ​ ​ ​

2023

Computed tax benefit at federal statutory rate

$

(21,914)

$

(17,684)

State tax, net of federal benefit

 

(53)

 

(277)

Deferred tax true-ups

 

727

 

(540)

Stock compensation

 

874

 

1,163

Deemed foreign dividend income

 

674

 

1,873

R&D tax credit

 

146

 

(793)

Permanent differences and other

 

(1,036)

 

(1,677)

Transaction cost

 

36

 

210

Executive compensation

 

47

 

40

Foreign rate differential from federal statutory rate

 

(423)

 

(330)

Impairment of goodwill

5,179

3,614

Contingencies

 

(341)

 

(613)

Valuation allowance

 

16,443

 

15,359

$

359

$

345

At December 31, 2025, the Company has federal and state NOL carryforwards of approximately $143.6 million and $127.7 million, respectively. The federal NOL carryforwards begin to expire in 2032, unless previously utilized, and the state NOL carryforwards will begin to expire in 2028, unless previously utilized. Included in the federal NOL carryforward total is $121.5 million generated after 2017 that can be carried over indefinitely and may be used to offset up to 80% of federal taxable income. At December 31, 2025, the Company has foreign NOL carryforwards of approximately $41.0 million, which begin to expire in 2029. At December 31, 2025, the Company has federal and California research and development tax credits of approximately $4.6 million and $3.2 million, respectively. The federal research tax credit begins to expire in 2037 unless previously utilized and the California research tax credit has no expiration date.

Utilization of the NOL and research and development (“R&D”) carryforwards might be subject to a substantial annual limitation due to ownership change limitations that may have occurred or that could occur in the future, as required by Section 382 of the Internal Revenue Code of 1986, as amended (the “Code”), as well as similar state and foreign provisions. These ownership changes may limit the amount of NOL and R&D credit carryforwards that can be utilized annually to offset future taxable income and tax, respectively. In general, an “ownership change” as defined by Section 382 of the Code results from a transaction or series of transactions over a three-year period resulting in an ownership change of more than 50 percentage points of the outstanding stock of a company by

certain stockholders or public groups. Since the Company’s formation, the Company has raised capital through the issuance of capital stock on several occasions which, combined with the purchasing stockholders’ subsequent disposition of those shares, may have resulted in such an ownership change, or could result in an ownership change in the future upon subsequent capital stock transactions.

During 2025, the Company completed a Section 382 analysis study to determine if any ownership changes had occurred in the past, and to determine the impact any such ownership changes would have on the Company’s ability to utilize its US federal NOL and R&D credit carryforwards.  This period for which this study was performed covered the years 2008 through 2024. Through this study, we determined that the Company had experienced three ownership changes, as defined by Section 382 of the Code, which limit the Company’s ability to use its federal NOL and R&D credit carryforwards accumulated as of the date of each ownership change. Based on this study, we determined that the Company should be able to access all of its federal NOL carryforwards prior to any expiration, with the exception of approximately $19.7 million of these carryforwards which are inaccessible due to these limitations and have thus expired. Additionally, we determined that the Company should be able to access all of its federal R&D credit carryforwards, with the exception of an immaterial amount of these carryforwards which are inaccessible and thus have expired. These federal NOL and R&D credit carryforwards which have expired under the rules of Section 382 of the Code have been removed from the Company’s deferred tax asset, with the corresponding reduction of the valuation allowance.

The Company has not rolled forward the Section 382 analysis study to include 2025. Based on a review of the facts and circumstances, any ownership change in 2025 would not impact the limitations currently applied to the federal NOL and R&D credit carryforwards. Additionally, the Company has not conducted a Section 382 analysis study to determine the impact of the ownership changes on state NOL and R&D credit carryforwards. Based on a review of the facts and circumstances, any potential limitation from the ownership changes should not impact the availability of NOLs and R&D credit carryforwards used in the current year, but may affect their availability in the future. Due to the existence of the valuation allowance, any such state NOL and R&D credit carryforwards that may expire prior to utilization as a result of such limitations will be removed from deferred tax assets, with a corresponding reduction of the valuation allowance.

Total cash paid for income taxes (net of refunds) for the years ended December 31, 2025, 2024, and 2023 is composed of the following (in thousands):

December 31, 

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2023

U.S. Federal

$

$

$

State

 

89

 

71

 

73

Foreign

 

 

 

China

 

531

 

538

 

450

Germany

 

1,319

 

147

 

156

Other

31

$

1,939

$

756

$

710

A reconciliation of the beginning and ending amounts of unrecognized tax positions for the years ended December 31, 2025, 2024, and 2023 are as follows (in thousands):

December 31, 

  ​ ​ ​

2025

  ​ ​ ​

2024

  ​ ​ ​

2023

Unrecognized tax positions, beginning of period

$

3,478

$

2,889

$

3,474

Gross increase – current period tax positions

 

151

 

110

 

133

Gross decrease – prior period tax positions

 

(705)

 

 

(718)

Gross increase – prior period tax positions

 

 

479

 

Expiration of statute of limitations

 

 

 

Unrecognized tax positions, end of period

$

2,924

$

3,478

$

2,889

If recognized, none of the unrecognized tax positions would impact the Company’s income tax benefit or effective tax rate as long as the Company’s deferred tax assets remain subject to a full valuation allowance. The Company does not expect any significant increases or decreases to the Company’s unrecognized tax positions within the next 12 months.

We recognize interest accrued related to unrecognized tax benefits (“UTBs”) and penalties as income tax expense. As of December 31, 2025, we have an immaterial accrual for interest in our consolidated balance sheet.

Due to the NOL carryforwards, the U.S. federal and state returns remain open to examination by the Internal Revenue Service and state taxing jurisdictions for all years beginning with the year ended March 31, 2006. Our foreign subsidiaries are generally subject to examination three years following the year on which the tax obligation originated. The years subject to audit may be extended if the entity substantially understates corporate income tax. The Company does not have any foreign subsidiaries currently under audit by their local income tax authorities.

Historical Timeline

Fiscal YearFiled
2025Mar 5, 2026Showing above
2024Mar 7, 2025
2023Mar 13, 2024

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.