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Accumulated Other Comprehensive Income and Reclassifications Adjustments (Details) - USD ($) $ in Thousands		9 Months Ended
	Apr. 30, 2019	Jan. 25, 2020
Accumulated other comprehensive loss
Balance, net of $0 deferred taxes, as of April 30, 2019		$ 2
Balance, net of $0 deferred taxes, as of January 25, 2020	$ 2	69
Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss
Balance, net of $0 deferred taxes, as of April 30, 2019		2
Change in foreign currency translation adjustments, net of $0 taxes		67
Balance, net of $0 deferred taxes, as of January 25, 2020	2	69
Other comprehensive income, tax	$ 0	0
Foreign Currency Translation Adjustments
Accumulated other comprehensive loss
Other comprehensive income, tax		$ 0

Accumulated adjustment, net of tax, that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency from the functional currency of the reporting entity, net of reclassification of realized foreign currency translation gains or losses.

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