Annual report pursuant to Section 13 and 15(d)

Fair Value of Derivatives Not Designated as Hedge Instruments (Detail)

v3.7.0.1
Fair Value of Derivatives Not Designated as Hedge Instruments (Detail) - Not Designated as Hedge Instrument - Foreign Exchange Forward Contracts - USD ($)
$ in Thousands
Apr. 30, 2017
Apr. 30, 2016
Derivative assets:    
Fair Value of Derivative Assets $ 129 $ 324
Derivative liabilities:    
Fair Value of Derivative Liabilities $ 846 $ 1,041