UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jan. 31, 2021	Jul. 31, 2020
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	750,000,000	750,000,000
Common stock, shares issued	112,572,514	82,251,801
Common stock, shares outstanding	112,572,514	82,251,801
Series A Cumulative Redeemable Perpetual Preferred Stock,
Cumulative Preferred Stock, par value	$ 0.001	$ 0.001
Cumulative Preferred Stock, shares authorized	1,000,000	1,000,000
Cumulative Preferred Stock, shares issued	0	0
Cumulative Preferred Stock, shares outstanding	0	0