Business Segment and Geographic Information (Details) - USD ($) $ in Thousands	Jan. 31, 2020	Jul. 31, 2019
Segment Reporting Information [Line Items]
Long-lived assets, net	$ 3,465	$ 3,516
Total assets	9,160	9,007
United States [Member]
Segment Reporting Information [Line Items]
Long-lived assets, net	2,872	3,304
Total assets	5,743	5,508
Foreign [Member]
Segment Reporting Information [Line Items]
Long-lived assets, net	593	212
Total assets	$ 3,417	$ 3,499