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Intangible Assets (Tables)
3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Intangible Assets

The following table sets forth information regarding intangible assets (in thousands):

 

   March 31, 2022   December 31, 2021 
Patents  $847   $847 
Accumulated amortization   (461)   (447)
Intangible assets, net  $386   $400