The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromSaleOfProductiveAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

DODGE CITY LAND ACQUISITION (Details) (USD $)	12 Months Ended
DODGE CITY LAND ACQUISITION (Details) (USD $)	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011	Apr. 30, 2010 acre	Jun. 30, 2009 acre
DODGE CITY LAND ACQUISITION [Abstract]
Area of land sold					104
Amount received by sale of land	$ 0	$ 0	$ 39,000	$ 2,000,000
Cost incurred for the sale of land				$ 1,500,000
Area of land purchases				49