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INTANGIBLE ASSETS
9 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Disclosure [Text Block] INTANGIBLE ASSETS, NET
The components of intangible assets, net consisted of the following (amounts in thousands):
Weighted Average Useful Lives
(in years)
September 30, 2021
September 30,
2021
December 31,
2020
Amortizable intangible assets:
     Patents, trademarks and other11.68$10,062 $10,181 
     Less accumulated amortization(8,527)(8,206)
$1,535 $1,975 
Amortization related to intangible assets for the nine months ended September 30, 2021 and 2020 totaled $0.6 million and $1.6 million, respectively. Intangible assets are included as a component of other assets in the Condensed Consolidated Balance Sheets.

The estimated aggregate amortization expense at September 30, 2021 for each of the years (or other periods) set forth below was as follows (amounts in thousands):
October 1 - December 31, 2021$37 
2022145 
2023145 
2024134 
2025123 
Thereafter951 
 $1,535