Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net

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Intangible Assets, Net
 3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net Intangible Assets, Net
The Company’s intangible assets consist of the following:
March 31, 2022 December 31, 2021
(In thousands) Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount
Amortizable intangible assets:
Patents $ 2,861  $ (267) $ 2,594  $ 2,469  $ (234) $ 2,235 
License agreements 1,101  (889) 212  1,101  (852) 249 
Total amortizable intangible assets 3,962  (1,156) 2,806  3,570  (1,086) 2,484 
Unamortized intangible assets
Trademarks 384  —  384  375  —  375 
Total intangible assets $ 4,346  $ (1,156) $ 3,190  $ 3,945  $ (1,086) $ 2,859 
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 $69 and $47 for the three months ended March 31, 2022 and 2021, respectively.

Year Ending December 31, (In thousands)
2022 (excluding the three months ended March 31, 2022) $ 189 
2023 218 
2024 149 
2025 149 
2026 148 
Thereafter 1,953 
Total $ 2,806 
License AgreementsRoyalty fees under our License Agreements with the University of Florida Research Foundation and the University of Texas at Austin were $673 and $641 during the three months ended March 31, 2022 and 2021, respectively, and are included in sales and marketing expense in the accompanying condensed consolidated statements of operations.