Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net

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Intangible Assets, Net
 9 Months Ended
Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net Intangible Assets, Net
The Company’s intangible assets consisted of the following (in thousands):
September 30, 2022 December 31, 2021
Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount
Amortizable intangible assets:
Patents $ 3,245  $ (342) $ 2,903  $ 2,469  $ (234) $ 2,235 
License agreements 1,101  (943) 158  1,101  (852) 249 
Total amortizable intangible assets 4,346  (1,285) 3,061  3,570  (1,086) 2,484 
Unamortized intangible assets
Trademarks 387  —  387  375  —  375 
Total intangible assets $ 4,733  $ (1,285) $ 3,448  $ 3,945  $ (1,086) $ 2,859 
Amortization expense consisted of the following (in thousands):
Three Months Ended September 30, Nine Months Ended September 30,
2022 2021 2022 2021
Amortization expense $ 66  $ 52  $ 198  $ 148 
Expected future amortization of intangible assets as of September 30, 2022, is as follows (in thousands):
Year Ending December 31, Expected Amortization Expense
2022 (excluding the nine months ended September 30, 2022) $ 68 
2023 237 
2024 169 
2025 169 
2026 167 
Thereafter 2,251 
Total amortized intangible assets $ 3,061 

License Agreements
The Company has License Agreements with the University of Florida Research Foundation and the University of Texas at Austin in which certain royalty payments are paid quarterly.
Royalty expense consisted of the following (in thousands):
Three Months Ended September 30, Nine Months Ended September 30,
2022 2021 2022 2021
Royalty expense $ 848  $ 687  $ 2,287  $ 2,037 
Royalty fees are included in sales and marketing expense on the accompanying condensed consolidated statements of operations.