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Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill by Segment
The following tables summarizes our goodwill by segment as of December 31, 2020 and 2019: 
(in thousands)20202019
Manufacturing$18,270 $18,270 
Plastics19,302 19,302 
Total Goodwill$37,572 $37,572 
Schedule of Components of Intangible Assets
The following table summarizes the components of our intangible assets at December 31, 2020 and 2019:
(in thousands)Gross
Amount		Accumulated
Amortization		Net Carrying
Amount
December 31, 2020
Customer Relationships$22,491 $12,370 $10,121 
Other26 3 23 
Total$22,517 $12,373 $10,144 
December 31, 2019
Customer Relationships$22,491 $11,259 $11,232 
Other179 121 58 
Total$22,670 $11,380 $11,290 
Schedule of Intangible Assets Amortization Expenses
Amortization expense for these intangible assets was as follows for the years ended December 31, 2020, 2019 and 2018: 
(in thousands)202020192018
Amortization Expense$1,146 $1,186 $1,315 
Schedule of Intangible Assets Future Amortization Expenses
Estimated annual amortization expense for these intangible assets for the next five years is: 
(in thousands)20212022202320242025
Estimated Amortization Expense$1,100 $1,100 $1,100 $1,100 $1,092