Property, Plants and Equipment - Schedule of Property Plant and Equipment (Details) - USD ($)	May 31, 2017	May 31, 2016
Property plant and equipment, gross	$ 33,446,479	$ 23,646,515
Less: Accumulated depreciation	(13,739,697)	(11,081,196)
Net Property, Plant and Equipment	19,706,782	12,565,319
Production Machinery and Equipment [Member]
Property plant and equipment, gross	27,493,614	18,616,603
Plant Buildings and Land [Member]
Property plant and equipment, gross	5,296,784	4,663,339
Leasehold Improvements [Member]
Property plant and equipment, gross	263,710	198,568
Furniture and Fixtures [Member]
Property plant and equipment, gross	$ 392,371	$ 168,005