Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets (Tables)

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Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of intangible assets
The Company’s intangible assets consist of the following:
March 31, 2021 December 31, 2020
Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount
Amortized intangible assets
Patents $ 1,814  $ (159) $ 1,655  $ 1,496  $ (139) $ 1,357 
License agreements 1,094  (772) 322  1,093  (745) 348 
Total amortizable intangible assets $ 2,908  $ (931) $ 1,977  $ 2,589  $ (884) $ 1,705 
Unamortized intangible assets
Trademarks $ 351  $ —  $ 351  $ 349  $ —  $ 349 
Total intangible asset, net $ 3,259  $ (931) $ 2,328  $ 2,938  $ (884) $ 2,054 
Schedule of future amortization
License agreements are being amortized over periods ranging from 17-20 years. Patent costs are being amortized over periods of up to 20 years. Amortization expense was approximately $47 and $36 for the three months ended March 31, 2021 and 2020, respectively.  As of March 31, 2021, future amortization of license agreements and patents is as follows:
Year Ending December 31,
2021 (excluding the three months ended March 31, 2021) $ 150 
2022 200 
2023 168 
2024 97 
2025 97 
Thereafter 1,265 
TOTAL $ 1,977