v3.26.3
Intangible Assets
9 Months Ended
Sep. 30, 2026
Intangible Assets  
Intangible Assets

Note 7. Intangible Assets

Finite-lived intangible assets

The following table presents the Company’s finite-lived intangible assets as of September 30, 2026:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

  ​ ​ ​

​

​

​

​

​

​

​

​

Weighted-

​

​

Gross

​

Accumulated

​

Net book

​

average life

​

  ​ ​ ​

book value

  ​ ​ ​

amortization

  ​ ​ ​

value

  ​ ​ ​

(years)

Customer contracts

​

$

29,400

​

$

(7,135)

​

$

22,265

 

10

Trademark

​

 

6,100

​

 

(2,614)

​

 

3,486

 

10

UL Listings

​

 

2,700

​

 

(1,088)

​

 

1,612

 

12

Patent licenses

​

​

560

​

​

(560)

​

​

—

​

Various

Finite-lived intangible assets

​

$

38,760

​

$

(11,397)

​

$

27,363

​

​

​

The following table presents the Company’s finite-lived intangible assets as of December 31, 2025:

​

​

​

​

​

​

​

​

​

​

​

​

​

​

  ​ ​ ​

​

​

​

​

​

​

​

​

​

Weighted-

​

​

Gross

  ​ ​ ​

Accumulated

  ​ ​ ​

Net book

​

average life

​

  ​ ​ ​

book value

  ​ ​ ​

amortization

  ​ ​ ​

value

  ​ ​ ​

(years)

Customer contracts

​

$

29,400

​

$

(4,938)

​

$

24,462

 

10

Trademark

​

 

6,100

​

 

(2,156)

​

 

3,944

 

10

UL Listings

​

 

2,700

​

 

(919)

​

 

1,781

 

12

Patent licenses

​

​

10,060

​

​

(10,060)

​

​

—

​

Various

Finite-lived intangible assets

​

$

48,260

​

$

(18,073)

​

$

30,187

​

​

​

For the three months ended September 30, 2026 and 2025, amortization expense related to finite-lived intangible assets was $0.9 million and $0.9 million, respectively, and $2.8 million and $2.9 million, respectively, for the nine months ended September 30, 2026 and 2025.

During the three months ended September 30, 2026, the Company determined that certain of its fully amortized patent licenses were no longer being utilized by the Company and the related value was removed from the amounts herein as of September 30, 2026.

The following table presents the estimated future amortization of the Company’s finite-lived intangible assets as of September 30, 2026:

​

​

​

​

​

Remainder of 2026

​

$

944

2027

​

 

3,775

2028

​

 

3,775

2029

​

 

3,775

2030

​

 

3,775

Thereafter

​

 

11,319

Total

​

$

27,363

​

The Company did not identify any impairment of its finite-lived intangible assets during the three and nine months ended September 30, 2026 and 2025.