Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Equity (Parenthetical)

v3.21.2
Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($)
12 Months Ended
Jul. 31, 2021
Jul. 31, 2020
August 2020 [Member] | Registered Direct Offering [Member]    
Payments of issuance cost $ 1,464,276  
January 2021 [Member] | Public Offering [Member]    
Payments of issuance cost $ 2,970,165  
February 2020 [Member] | Private Placement [Member]    
Payments of issuance cost   $ 1,954,678