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Intangible Assets, Net
 3 Months Ended
Mar. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net Intangible Assets, Net
Intangible assets consist of the following:
March 31, 2025December 31, 2024
(in thousands)Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Amortizable intangible assets:
Patents$6,431 $(1,140)$5,291 $6,090 $(1,073)$5,017 
Unamortized intangible assets:
Trademarks590 — 590 562 — 562 
Total intangible assets$7,021 $(1,140)$5,881 $6,652 $(1,073)$5,579 
Amortization expense is as follows:
Three Months Ended March 31,
(in thousands)20252024
Amortization expense$67 $62 
As of March 31, 2025, future amortization of patents is as follows:
Year Ending December 31,(in thousands)
2025 (excluding the three months ended March 31, 2025)$226 
2026309 
2027309 
2028309 
2029309 
Thereafter3,829 
Total$5,291