Stockholders' Equity (Details) - Schedule of share-based compensation expense - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2018	Jan. 31, 2017
Stockholders' Equity (Details) - Schedule of share-based compensation expense [Line Items]
Stock Based Compensation Expense	$ 208	$ 241	$ 413	$ 392
Options [Member]
Stockholders' Equity (Details) - Schedule of share-based compensation expense [Line Items]
Stock Based Compensation Expense	205	236	407	382
Restricted Stocks [Member]
Stockholders' Equity (Details) - Schedule of share-based compensation expense [Line Items]
Stock Based Compensation Expense	$ 3	$ 5	$ 6	$ 10