Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)	May. 31, 2015	May. 31, 2014
Property, Plant and Equipment [Abstract]
Production machinery and equipment	$ 13,120,285	$ 12,826,529
Plant buildings and land	4,663,339	4,663,339
Leasehold improvements	198,568	203,034
Furniture and fixtures	90,280	210,196
Property and Equipment gross	18,072,472	17,903,098
Less: Accumulated depreciation	(9,563,157)	(9,126,961)
Net Property and Equipment	$ 8,509,315	$ 8,776,137