Fair Value of Financial Instruments (Tables)

3 Months Ended

Jul. 31, 2014

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, 2014 and April 30, 2014, respectively, and indicates the fair value hierarchy of the valuation techniques we used to determine such fair value (in thousands):

	July 31, 2014
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Cash equivalents	$	44,060	$	—	$	—	$	44,060
Marketable securities		7,572		18,393		—		25,965
Total	$	51,632	$	18,393	$	—	$	70,025
	April 30, 2014
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance
Cash equivalents	$	51,561	$	—	$	—	$	51,561
Marketable securities		8,338		15,167		—		23,505
Total	$	59,899	$	15,167	$	—	$	75,066