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Fair Value of Financial Instruments (Tables)
 6 Months Ended
Oct. 31, 2023
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis
The following tables present our assets and liabilities that we measured at fair value on a recurring basis as of October 31, 2023 and April 30, 2023, and indicate the fair value hierarchy of the valuation techniques we used to determine such fair value (in thousands):
 October 31, 2023
 Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)		Balance
Cash equivalents$58,544 $— $— $58,544 
U.S Treasury securities5,096 — — 5,096 
Marketable securities15,821 — — 15,821 
Total$79,461 $— $— $79,461 
April 30, 2023
Quoted Prices
in Active
Markets for
Identical Assets
(Level 1)		Significant
Other
Observable
Inputs
(Level 2)		Significant
Unobservable
Inputs
(Level 3)		Balance
Cash equivalents$81,352 $— $— $81,352 
U.S Treasury securities7,305 — — 7,305 
Marketable securities16,632 — — 16,632 
Total$105,289 $— $— $105,289