Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical)

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CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($)
3 Months Ended
Oct. 31, 2019
Jul. 31, 2019
Jan. 31, 2019
Jul. 31, 2018
Statement of Stockholders' Equity [Abstract]        
Issuance costs $ 24,500 $ 70,000 $ 35,000 $ 105,000