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INTANGIBLE ASSETS (Tables)
9 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets and Goodwill [Table Text Block]
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 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
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