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Intangible Assets
9 Months Ended
Jan. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets

(7) Intangible Assets

 

The components of intangible assets, net as of January 31, 2023 and April 30, 2022 consisted of the following:

 

   January 31,
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   (1,761)   (1,642)
Intangible assets, net  $4,017   $4,136 

 

Amortization expense was approximately $119,000 and $18,000 for the nine-month periods ended January 31, 2023 and 2022, respectively. Amortization expense was approximately $40,000 and $6,000 for the three-month periods ended January 31, 2023 and 2022, respectively.