Business Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2020	Jan. 31, 2019
Segment Reporting Information [Line Items]
Revenues	$ 1,236	$ 1,017	$ 2,446	$ 2,152
Loss from operations	(1,906)	(1,406)	(3,448)	(2,526)
Real Estate [Member]
Segment Reporting Information [Line Items]
Revenues	1,236	1,017	2,446	2,152
Loss from operations	(1,392)	(1,109)	(2,668)	(1,823)
Pharmaceuticals [Member]
Segment Reporting Information [Line Items]
Revenues
Loss from operations	$ (514)	$ 297	$ (780)	$ (703)