Annual report pursuant to Section 13 and 15(d)

Segment reporting (Details) - Schedule of segment revenue by geographical

v3.20.2
Segment reporting (Details) - Schedule of segment revenue by geographical - Product Revenue [Member] - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2018
Segment reporting (Details) - Schedule of segment revenue by geographical [Line Items]      
Revenues $ 26,561 $ 30,055 $ 29,936
UNITED STATES      
Segment reporting (Details) - Schedule of segment revenue by geographical [Line Items]      
Revenues 14,580 16,966 16,220
Foreign Countries [Member]      
Segment reporting (Details) - Schedule of segment revenue by geographical [Line Items]      
Revenues $ 11,981 $ 13,089 $ 13,716