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Intangible Assets, Net
 9 Months Ended
Sep. 30, 2024
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net Intangible Assets, Net
Intangible assets, net, are summarized as follows (in thousands):
September 30, 2024December 31, 2023
Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Amortized intangible assets
Patents and know-how$10,207 $(8,307)$1,900 $10,039 $(7,818)$2,221 
Licenses1,000 (92)908 1,000 (54)$946 
Distribution rights7,659 (765)6,894 — — — 
Total amortized intangible assets$18,866 $(9,164)$9,702 $11,039 $(7,872)$3,167 
Unamortized intangible assets:
Tradenames and trademarks$1,008 $1,008 $1,008 $1,008 
Patents in Process491 491 1,082 1,082 
Total intangible assets$20,365 $11,201 $13,129 $5,257 
The Company recognized $0.3 million and $0.4 million of impairment of intangible assets during the three and nine months ended September 30, 2024, respectively, related to abandoned patents.
Expected future amortization of intangible assets as of September 30, 2024, is as follows (in thousands):
Year ending December 31,Estimated
Amortization
Expense
2024 (excluding the nine months ended September 30, 2024)
$577 
20251,912 
20261,757 
20271,757 
20281,755 
Thereafter1,944 
Total amortized intangible assets$9,702