Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets, Net

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Intangible Assets, Net
 6 Months Ended
Jun. 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):
June 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 $ 3,083  $ (304) $ 2,780  $ 2,469  $ (234) $ 2,235 
License agreements 1,101  (916) 185  1,101  (852) 249 
Total amortizable intangible assets 4,184  (1,219) 2,965  3,570  (1,086) 2,484 
Unamortized intangible assets
Trademarks 380  —  380  375  —  375 
Total intangible assets $ 4,565  $ (1,219) $ 3,346  $ 3,945  $ (1,086) $ 2,859 
Amortization expense consisted of the following (in thousands):
Three Months Ended June, 30 Six Months Ended June 30,
2022 2021 2022 2021
Amortization expense $ 63  $ 49  $ 132  $ 96 
Expected future amortization of intangible assets as of June 30, 2022, is as follows (in thousands):
Year Ending December 31, Expected Amortization Expense
2022 (excluding the six months ended June 30, 2022) $ 131 
2023 229 
2024 160 
2025 159 
2026 158 
Thereafter 2,128 
Total amortized intangible assets $ 2,965 

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 June, 30 Six Months Ended June 30,
2022 2021 2022 2021
Royalty expense $ 766  $ 709  $ 1,439  $ 1,350 
Royalty fees are included in sales and marketing expense on the condensed consolidated statements of operations.