Fair Value Measurements (Details) - Schedule of balance of assets and liabilities measured at fair value on a recurring basis - USD ($) $ in Thousands		Apr. 30, 2021		Jul. 31, 2020
Assets:
Foreign exchange forward contracts		$ 10		$ 10
Liabilities:
Foreign exchange forward contracts
Fair Value, Inputs, Level 1 [Member] | Fair Value, Recurring [Member]
Assets:
Foreign exchange forward contracts	[1]
Liabilities:
Foreign exchange forward contracts	[1]
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]
Assets:
Foreign exchange forward contracts	[2]	10		10
Liabilities:
Foreign exchange forward contracts			[2]		[3]
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]
Assets:
Foreign exchange forward contracts	[3]
Liabilities:
Foreign exchange forward contracts	[3]

[1] quoted prices in active markets for identical assets or liabilities

[2] observable inputs other than quoted prices in active markets for identical assets and liabilities

[3] no observable pricing inputs in the market