Annual report pursuant to Section 13 and 15(d)

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

v3.19.2
Financial Instruments - Fair Value of Derivatives Not Designated as Hedge Instruments (Detail) - Not Designated as Hedge Instrument - Foreign Exchange Forward Contracts - USD ($)
$ in Thousands
Apr. 30, 2019
Apr. 30, 2018
Derivative assets:    
Fair Value of Derivative Assets $ 821 $ 1,778
Derivative liabilities:    
Fair Value of Derivative Liabilities $ 722 $ 1,025