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Fair Value Measurements (Tables)
6 Months Ended
Oct. 31, 2020
Fair Value Disclosures [Abstract]  
Schedule of Assets Measured at Fair Value on Recurring Basis
The following table summarizes assets that are measured at fair value on a recurring basis as of October 31, 2020 and April 30, 2020 (in thousands):
 
October 31, 2020Level 1Level 2Level 3Total
Financial Assets:    
Cash and cash equivalents:    
Money market funds$175,007 — — $175,007 

April 30, 2020Level 1Level 2Level 3Total
Financial Assets:    
Cash and cash equivalents:    
Money market funds$197,314 — — $197,314