Fair Value of Financial Instruments (Tables)

6 Months Ended

Oct. 31, 2016

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, 2016 and April 30, 2016, respectively, and indicates the fair value hierarchy of the valuation techniques we used to determine such fair value (in thousands):

	October 31, 2016
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Cash equivalents	$	45,434	$	—	$	—	$	45,434
Marketable securities		7,404		16,707		—		24,111
Total	$	52,838	$	16,707	$	—	$	69,545
	April 30, 2016
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Cash equivalents	$	45,977	$	—	$	—	$	45,977
Marketable securities		7,374		21,487		—		28,861
Total	$	53,351	$	21,487	$	—	$	74,838