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INTANGIBLE ASSETS (Tables)
6 Months Ended
Jun. 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)
June 30, 2021
June 30,
2021
December 31,
2020
Amortizable intangible assets:
     Patents, trademarks and other12.25$10,062 $10,181 
     Less accumulated amortization(8,490)(8,206)
$1,572 $1,975 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]
The estimated aggregate amortization expense at June 30, 2021 for each of the years (or other periods) set forth below was as follows (amounts in thousands):
July 1 - December 31, 2021$72 
2022145 
2023145 
2024134 
2025123 
Thereafter953 
 $1,572