Acquired Intangible Assets, net for Continuing Operations (Details) - USD ($) $ in Thousands	Jan. 31, 2016	Apr. 30, 2015
Acquired Finite Lived and Indefinite Lived Intangible Assets [Line Items]
Gross Fair Value	$ 15,100	$ 15,100
Accumulated Amortization	(5,020)	(3,602)
Total	10,080	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	(3,849)	(2,921)
Acquired finite-lived intangible assets, net book value	7,986	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	(1,171)	(681)
Acquired finite-lived intangible assets, net book value	$ 2,094	$ 2,584