Reportable Segments (Details Textual) - 3 months ended Jul. 31, 2015	Industry Segment
Reportable Segments (Textual) [Abstract]
Number of industries in which Company operates	1
Number of reportable segments \| Segment	3

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration