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OPERATING EXPENSES - OTHER: (Details Textual) (USD $)	12 Months Ended
OPERATING EXPENSES - OTHER: (Details Textual) (USD $)	Apr. 30, 2012	Apr. 30, 2011
Proceeds from Sale of Buildings	$ 73,000
Other Restructuring Costs		$ 516,000

- Definition

Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

+ References+ Details