Acquired Intangible Assets, net for Continuing Operations (Details) - USD ($) $ in Thousands	Apr. 30, 2016	Apr. 30, 2015
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	$ 15,100	$ 15,100
Accumulated Amortization	(5,493)	(3,602)
Total	9,607	11,498
Customer relationships
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	11,835	11,835
Accumulated Amortization	(4,158)	(2,921)
Acquired finite-lived intangible assets, net book value	7,677	8,914
Developed technology
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets, gross	3,265	3,265
Accumulated Amortization	(1,335)	(681)
Acquired finite-lived intangible assets, net book value	$ 1,930	$ 2,584