SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - Inventories - USD ($)	May 31, 2016	May 31, 2015
Inventories [Abstract]
Raw materials	$ 942,000	$ 958,000
Work in progress	690,000	831,000
Finished products	231,000	238,000
Total	$ 1,863,091	$ 2,027,372