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Stockholders' Equity - Schedule of Fair Value, Valuation Assumptions (Details)
12 Months Ended
May 31, 2018
USD ($)
Equity [Abstract]  
Estimated fair value of warrants at date of grant $ 120,000
Average expected life (years) 6 years
Average expected volatility factor 145.77%
Average risk-free interest rate 4.00%
Average expected dividend yields 0.00%