Fair Value Measurements (Details) - Schedule of liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Schedule of liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) [Abstract]
Balance, beginning of period	$ 396
Total gain included in “Foreign currency translation adjustment”	(5)
Balance, end of period	391
Change in unrealized gains or losses for the period included in earnings for liabilities held at the end of the period