Fair Value Measurements (Details) - USD ($) $ in Thousands		Jan. 31, 2020	Jul. 31, 2019
Assets:
Foreign exchange forward contracts
Liabilities:
Foreign exchange forward contracts		14	38
Fair Value on a Recurring Basis [Member] | Level 1 [Member]
Assets:
Foreign exchange forward contracts	[1]
Liabilities:
Foreign exchange forward contracts	[1]
Fair Value on a Recurring Basis [Member] | Level 2 [Member]
Assets:
Foreign exchange forward contracts	[2]
Liabilities:
Foreign exchange forward contracts	[2]	14	38
Fair Value on a Recurring Basis [Member] | Level 3 [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