Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets

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Intangible Assets
9 Months Ended
Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets INTANGIBLE ASSETS
Intangible assets consist of the following:
September 30, 2021
Cost Accumulated Amortization Net
Raw material supply agreement $ 6,230  $ (4,096) $ 2,134 
Renewable diesel technology 8,300  (4,058) 4,242 
Acquired customer relationships 4,747  (2,395) 2,352 
Other intangibles 200  (197)
Total intangible assets $ 19,477  $ (10,746) $ 8,731 
December 31, 2020
Cost Accumulated Amortization Net
Raw material supply agreement $ 6,230  $ (3,618) $ 2,612 
Renewable diesel technology 8,300  (3,643) 4,657 
Acquired customer relationships 4,747  (2,025) 2,722 
Other intangible assets 904  (187) 717 
Total intangible assets $ 20,181  $ (9,473) $ 10,708 
The Company recorded intangible amortization expense of $449 and $1,273 for the three and nine months ended September 30, 2021, and $328 and $999 for the three and nine months ended September 30, 2020, respectively.
The estimated intangible asset amortization expense for the remainder of 2021 through 2027 and thereafter is as follows:
October 1, 2021 through December 31, 2021 $ 452 
2022 1,619 
2023 1,629 
2024 1,640 
2025 1,443 
2026 611 
2027 and thereafter 1,337 
Total $ 8,731