Acquired Intangible Assets, net for Continuing Operations (Details) - USD ($) $ in Thousands	Oct. 31, 2017	Apr. 30, 2017
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	$ 15,100	$ 15,100
Accumulated Amortization	(8,328)	(7,383)
Total	6,772	7,717
Customer relationships
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	11,835	11,835
Accumulated Amortization	(6,013)	(5,395)
Acquired finite-lived intangible assets, net book value	5,822	6,440
Developed technology
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	3,265	3,265
Accumulated Amortization	(2,315)	(1,988)
Acquired finite-lived intangible assets, net book value	$ 950	$ 1,277