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Fair Value of Financial Instruments (Tables)
9 Months Ended
Jan. 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 January 31, 2025 and April 30, 2024 (in thousands):
 January 31, 2025
Financial AssetsLevel 1Level 2Total
Trading securities held in non-qualified compensation plans (1)
$1,849 $— $1,849 
Cash surrender value of life insurance policies (1)
— 1,484 1,484 
Total$1,849 $1,484 $3,333 
Financial Liabilities
Non-qualified compensation plans (2)
$— $3,818 $3,818 
Total$— $3,818 $3,818 
 April 30, 2024
Financial AssetsLevel 1Level 2Total
Trading securities held in non-qualified compensation plans (1)
$1,565 $— $1,565 
Cash surrender value of life insurance policies (1)
— 1,077 1,077 
Total$1,565 $1,077 $2,642 
Financial Liabilities
Non-qualified compensation plans (2)
$— $3,009 $3,009 
Total$— $3,009 $3,009 
(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.