Intangible Assets Including Acquisition-Related Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2017	Apr. 30, 2016
Finite-Lived Intangible Assets [Line Items]
Beginning Balance	$ 1,858	$ 2,748
Amortization expense	(1,659)	(890)
Ending Balance	3,399	1,858
AdapChain Inc
Finite-Lived Intangible Assets [Line Items]
Intangibles related to the Acquisition	3,200
Supply Chain Management
Finite-Lived Intangible Assets [Line Items]
Beginning Balance	1,858	2,748
Amortization expense	(1,659)	(890)
Ending Balance	3,399	$ 1,858
Supply Chain Management | AdapChain Inc
Finite-Lived Intangible Assets [Line Items]
Intangibles related to the Acquisition	$ 3,200