Schedule of Property, Plant and Equipment (Details)	3 Months Ended
	Jul. 31, 2012
Property And Equipment Schedule Of Property, Plant And Equipment 1	26,036
Property And Equipment Schedule Of Property, Plant And Equipment 2	25,151
Property And Equipment Schedule Of Property, Plant And Equipment 3	885
Property And Equipment Schedule Of Property, Plant And Equipment 4	0
Property And Equipment Schedule Of Property, Plant And Equipment 5	1,126