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Intangible Assets, Net (Tables)
12 Months Ended
Dec. 31, 2021
Goodwill And Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets

Intangible assets, net consisted of the following (in thousands):

 

 

 

2021

 

 

2020

 

Long-lived amortized intangible assets

 

Gross

Carrying

Amount

 

 

Accumulated

Amortization

 

 

Net

 

 

Gross

Carrying

Amount

 

 

Accumulated

Amortization

 

 

Net

 

Patents and licenses

 

$

9,315

 

 

$

(9,097

)

 

$

218

 

 

$

9,382

 

 

$

(9,112

)

 

$

270

 

 

Finite-lived Intangible Assets Amortization Expense

Amortization expense for intangible assets were as follows (in thousands):

 

 

 

Years Ended

 

 

 

2021

 

 

2020

 

 

2019

 

Amortization expense

 

$

34

 

 

$

35

 

 

$

34

 

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

Future amortization of intangible assets is as follows (in thousands):

 

Year Ended

 

Amount

 

2022

 

$

32

 

2023

 

 

32

 

2024

 

 

32

 

2025

 

 

32

 

2026

 

 

32

 

Thereafter

 

 

58

 

Total

 

$

218