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Intangible Assets (Tables)
6 Months Ended
Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Finite-Lived Intangible Assets
Intangible assets consisted of the following:
(in thousands)June 30, 2022December 31, 2021
Patents$425 $432 
Less accumulated amortization(235)(217)
$190 $215