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Fair Value of Financial Instruments
9 Months Ended
Jan. 31, 2022
Fair Value Disclosures [Abstract]  
Fair Value of Financial Instruments Fair Value of Financial Instruments
The Company's financial instruments consist primarily of cash and equivalents, mutual funds, cash surrender value of life insurance policies, and short-term borrowings. The carrying value of these assets and liabilities approximates their fair value. 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, 2022 and April 30, 2021 (in thousands):
 January 31, 2022
Financial AssetsLevel 1Level 2Total
Trading securities held in non-qualified compensation plans (1)
$1,274 $— $1,274 
Cash surrender value of life insurance policies (1)
— 1,441 1,441 
Total$1,274 $1,441 $2,715 
Financial Liabilities
Non-qualified compensation plans (2)
$— $3,164 $3,164 
Total$— $3,164 $3,164 
 April 30, 2021
Financial AssetsLevel 1Level 2Total
Trading securities held in non-qualified compensation plans (1)
$1,299 $— $1,299 
Cash surrender value of life insurance policies (1)
— 1,458 1,458 
Total$1,299 $1,458 $2,757 
Financial Liabilities
Non-qualified compensation plans (2)
$— $3,169 $3,169 
Total$— $3,169 $3,169 
(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.