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Note 7 - Commitments and Contingencies	6 Months Ended
Note 7 - Commitments and Contingencies	Oct. 31, 2015
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	7 . COMMITMENTS AND CONTINGENCIES As of October 31, 2015, we guaranteed the residual value of certain leased equipment in the amount of $4.7 million. If the proceeds from the sale of such equipment are less than the balance required by the lease when the lease terminates on August 1, 2017, the Company shall be required to pay the difference up to such guaranteed amount. The Company expects to have no loss on such guarantee.