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Fair Value of Financial Instruments (Tables)
3 Months Ended
Jul. 31, 2025
Fair Value Disclosures [Abstract]  
Summary of Fair Value Hierarchy for Financial Assets and Liabilities Measured Recurring Basis The following tables summarize the Company's fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of July 31, 2025 and April 30, 2025 (in thousands):
 July 31, 2025
Financial AssetsLevel 1Level 2Total
Trading securities held in non-qualified compensation plans (1)
$2,340 $— $2,340 
Cash surrender value of life insurance policies (1)
— 1,514 1,514 
Total$2,340 $1,514 $3,854 
Financial Liabilities
Non-qualified compensation plans (2)
$— $4,334 $4,334 
Total$— $4,334 $4,334 
 April 30, 2025
Financial AssetsLevel 1Level 2Total
Trading securities held in non-qualified compensation plans (1)
$1,861 $— $1,861 
Cash surrender value of life insurance policies (1)
— 1,403 1,403 
Total$1,861 $1,403 $3,264 
Financial Liabilities
Non-qualified compensation plans (2)
$— $3,708 $3,708 
Total$— $3,708 $3,708 
(1)The Company maintains two non-qualified compensation plans which include investment assets in a rabbi trust. These assets consist of marketable securities, which are valued using quoted market prices multiplied by the number of shares owned, and life insurance policies, which are valued at their cash surrender value.
(2)Plan liabilities are equal to the individual participants' account balances and other earned retirement benefits.