Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2019	Jul. 31, 2019
Statement of Financial Position [Abstract]
Series B Preferred stock, par value	$ 1.00	$ 1.00
Series B Preferred stock, shares authorized	100	100
Series B Preferred stock, shares issued	100	100
Series B Preferred stock, shares outstanding	100	100
Series B Preferred stock, liquidation preference	$ 10	$ 10
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	400,000,000	400,000,000
Common stock, shares issued	154,810,655	154,810,655
Common stock, shares outstanding	154,810,655	154,810,655