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Intangible Assets
 6 Months Ended
Jun. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
Intangible assets consisted of the following:
(in thousands)June 30, 2023December 31, 2022
Patents$413 $404 
Less accumulated amortization(271)(244)
Total intangible assets$142 $160 
The weighted average remaining useful life of the patents was 3.9 years. For the three and six months ended June 30, 2023 and 2022, amortization expense was immaterial