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Intangible Assets
9 Months Ended
Sep. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets

5. Intangible Assets

Intangible Assets consist of the following (in thousands):

 

 

September 30,

 

 

December 31,

 

 

 

2023

 

 

2022

 

Patents

 

$

1,286

 

 

$

1,286

 

Less: accumulated amortization

 

 

(544

)

 

 

(483

)

 

 

 

742

 

 

 

803

 

Indefinite life logos and trademarks

 

 

75

 

 

 

75

 

Intangible assets, net

 

$

817

 

 

$

878

 

Amortization expense for the three months ended September 30, 2023 and 2022 was $20 thousand and $21 thousand, respectively. Amortization expense for the nine months ended September 30, 2023 and 2022 was $61 thousand and $60 thousand, respectively.