11. SUPPLEMENTAL INFORMATION OF CASH FLOWS (Details) (USD $)	12 Months Ended
	May 31, 2014	May 31, 2013
Non-cash investing and financing activities:
Acquisition of equipment in exchange for net related party receivable	$ 1,087,302	$ 0
Reduction in net carrying value of equipment resulting from capital lease termination	212,311	0
Settlement of related party note payable in acquisition of equipment	527,716	0
Preferred dividend accrual	27,603	326,781
Supplemental information:
Interest paid	567,507	423,530
Taxes paid	$ 26,045	$ 0