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Warrants to Purchase Common Stock - Schedule of Fair Value for the Warrants and Stock Options, Valuation Assumptions (Details)
9 Months Ended
Feb. 28, 2017
USD ($)
Warrants To Purchase Common Stock  
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%