Condensed Consolidated Statements of Comprehensive (Loss) Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Feb. 28, 2015	Feb. 28, 2014	Feb. 28, 2015	Feb. 28, 2014
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (1,726)us-gaap_ProfitLoss	$ 212us-gaap_ProfitLoss	$ (4,747)us-gaap_ProfitLoss	$ 183us-gaap_ProfitLoss
Other comprehensive (loss) income , net of tax: Net change in cumulative translation adjustment	(111)	14	(223)	59
Total comprehensive (loss) income	(1,837)	226	(4,970)	242
Less: Comprehensive income (loss) attributable to the noncontrolling interest	0	0	3	(1)
Comprehensive (loss) income, attributable to Aehr Test Systems	$ (1,837)us-gaap_ComprehensiveIncomeNetOfTax	$ 226us-gaap_ComprehensiveIncomeNetOfTax	$ (4,973)us-gaap_ComprehensiveIncomeNetOfTax	$ 243us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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