Note 4 - Property and Equipment: Property and equipment table (Details) (USD $)	Apr. 30, 2014	Apr. 30, 2013
Details
Machinery and Equipment, Gross	$ 11,987,404	$ 11,687,057
Buildings and Improvements, Gross	10,303,529	10,192,769
Construction in Progress, Gross	1,284,199	668,330
Property, Plant and Equipment, Gross	24,562,440	23,504,377
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(9,624,082)	(7,778,993)
Property and equipment, net	$ 14,938,358	$ 15,725,384