Annual report pursuant to Section 13 and 15(d)

Consolidated Statement of Changes in Stockholders' (Deficit) Equity (Parenthetical)

v3.20.2
Consolidated Statement of Changes in Stockholders' (Deficit) Equity (Parenthetical) - $ / shares
 12 Months Ended
May 31, 2019
May 31, 2018
Warrants Granted Per Share   $ 0.50
Proceeds from private equity offering, per share $ 0.50 0.50
Proceeds from registered direct offering, per share 0.50 0.50
Common Stock [Member]    
Warrants Granted Per Share   0.50
Proceeds from private equity offering, per share 0.50 0.50
Proceeds from registered direct offering, per share $ 0.50 $ 0.50