Fair Value of Financial Instruments (Tables)

9 Months Ended

Jan. 31, 2020

Fair Value Disclosures [Abstract]

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 January 31, 2020 and April 30, 2019, and indicate the fair value hierarchy of the valuation techniques we used to determine such fair value (in thousands):

	January 31, 2020
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Cash equivalents	$	64,363	$	—	$	—	$	64,363
Marketable securities	13,339		14,139		—		27,478
Total	$	77,702	$	14,139	$	—	$	91,841

	April 30, 2019
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Cash equivalents	$	56,645	$	—	$	—	$	56,645
Marketable securities	11,002		16,192		—		27,194
Total	$	67,647	$	16,192	$	—	$	83,839