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Intangible Assets
12 Months Ended
Apr. 30, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets

(7) Intangible Assets

 

The components of intangible assets, net as of April 30, 2023 and 2022 consisted of the following:

 

   April 30, 2023   April 30, 2022 
   (in thousands) 
Patents  $2,729   $2,729 
Trademarks  $2,769   $2,769 
Tradename  $130   $130 
Customer Relationships  $150   $150 
Intangible assets, gross  $5,778   $5,778 
Accumulated amortization  $(1,800)  $(1,642)
Intangible assets, net  $3,978   $4,136 

 

Amortization expense was approximately $158,000 and $86,000 for the years ended April 30, 2023 and 2022, respectively. Trademarks are not subject to amortization.