CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Oct. 31, 2018	Jul. 31, 2018
Accounts receivable, trade, allowance for doubtful accounts	$ 481	$ 480
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares Authorized	4,965,000	4,965,000
Preferred stock, shares issued	4,965,000	4,965,000
Preferred stock, shares outstanding	4,965,000	4,965,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares Authorized	1,400,000,000	1,400,000,000
Common stock, shares issued	61,386,888	60,742,859
Common stock, shares outstanding	61,386,888	60,742,859
Contingent Convertible Preferred Stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares Authorized	35,000	35,000
Preferred stock, shares issued	35,000	35,000
Preferred stock, shares outstanding	35,000	35,000