Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Equity (Parenthetical)

v3.19.3
Consolidated Statements of Stockholders' Equity (Parenthetical) - USD ($)
1 Months Ended 12 Months Ended
May 24, 2019
Dec. 06, 2018
Oct. 08, 2018
Oct. 25, 2017
Feb. 28, 2018
Jul. 31, 2019
Jul. 31, 2018
Statement of Stockholders' Equity [Abstract]              
Payment of finance and offering costs $ 1,025,655 $ 304,916 $ 573,189 $ 901,137 $ 2,249,169 $ 80,575 $ 299,963