CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jan. 31, 2018	Jul. 31, 2017
Accounts receivable, trade, allowance for doubtful accounts	$ 75	$ 616
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares Authorized	4,965,000	5,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares Authorized	1,400,000,000	1,400,000,000
Common stock, shares issued	60,205,946	55,555,973
Common stock, shares outstanding	60,205,946	55,555,973
Contingent Convertible Preferred Stock
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares Authorized	35,000	0
Preferred stock, shares issued	35,000	0
Preferred stock, shares outstanding	35,000	0