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Fair Value Measurements (Tables)
9 Months Ended
Jan. 31, 2021
Fair Value Disclosures [Abstract]  
Fair Value of Assets on Recurring Basis The following table summarizes the fair value of assets and liabilities that are recorded in the Company’s consolidated financial statements as of January 31, 2021 and April 30, 2020 at fair value on a recurring basis (in thousands):
 Fair Value Measurements
 As of January 31, 2021
 Level 1Level 2Level 3
ASSETS:   
Mutual funds$659 $— $— 
Foreign exchange forward contracts— 618 — 
Total assets at fair value$659 $618 $— 
 As of April 30, 2020
 Level 1Level 2Level 3
ASSETS:   
Mutual funds$773 $— $— 
LIABILITIES:
Foreign exchange forward contracts$— $(1,102)$—