Acquired Intangible Assets, net for Continuing Operations (Details) - USD ($) $ in Thousands	Apr. 30, 2017	Apr. 30, 2016
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	$ 15,100	$ 15,100
Accumulated Amortization	(7,383)	(5,493)
Total	7,717	9,607
Customer relationships
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	11,835	11,835
Accumulated Amortization	(5,395)	(4,158)
Acquired finite-lived intangible assets, net book value	6,440	7,677
Developed technology
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	3,265	3,265
Accumulated Amortization	(1,988)	(1,335)
Acquired finite-lived intangible assets, net book value	$ 1,277	$ 1,930