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COMMITMENTS AND CONTINGENCIES (Tables)
12 Months Ended
May 31, 2018
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Years ending May 31,

 

 

2019

$

302,408

2020

 

311,782

2021

 

321,449

2022

 

112,299

2023

 

42,960

Thereafter

 

159,256

Total

$

1,250,154