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Intangible Assets
 12 Months Ended
Dec. 31, 2025
Intangible Assets  
Intangible Assets

Note 4 – Intangible Assets

Intangible assets are summarized as follows:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

​

December 31, 

​

​

2025

  ​ ​ ​

2024

​

​

Gross Carrying

​

Accumulated

​

Gross Carrying

​

Accumulated

​

​

Amount

  ​ ​ ​

Amortization

  ​ ​ ​

Amount

  ​ ​ ​

Amortization

Intangible assets:

​

​

​

​

​

​

​

​

​

​

​

​

Licenses

​

$

149

​

$

(78)

​

$

149

​

$

(69)

Patents

​

​

261

​

​

(25)

​

​

135

​

​

(12)

Patents pending

​

​

1,813

 

​

—

 

​

1,831

 

​

—

Trademarks

​

​

13

​

​

—

​

​

13

​

​

—

Trademarks pending

​

​

33

 

​

—

 

​

25

 

​

—

Total intangible assets

​

$

2,269

​

$

(103)

​

$

2,153

​

$

(81)

​

Amortization expense for intangible assets is summarized as follows:

​

​

​

​

​

​

​

​

​

​

  ​ ​ ​

December 31, 

 

​

​

2025

  ​ ​ ​

2024

​

Amortization expense

​

$

22

​

$

15

​

​

Useful lives of intangible assets range from three to 20 years. Amortization expenses are expensed within research and development in Operating Expenses in the Company’s Consolidated Statements of Operations and Comprehensive Loss.

During 2025, the Company concluded there were assets on the Consolidated Balance Sheets related to patent application costs for patents that the Company is no longer pursuing. As the carrying amount of the intangible asset was not recoverable and the carrying value exceeded its fair value, an impairment loss was recognized. The fair value of these identified patents was determined to be zero and therefore the full carrying value $748 was written off. As of December 31, 2025, the Company recognized $748 in impairment loss which is presented in research and development expense within the Consolidated Statements of Operations and Comprehensive Loss.