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Fair Value of Financial Instruments (Tables)
 3 Months Ended
Jul. 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 July 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):
 July 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$89,068 $— $— $89,068 
U.S Treasury securities4,103 4,103 
Marketable securities17,339 — — 17,339 
Total$110,510 $— $— $110,510 
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