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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

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-Article 5

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-Subparagraph (SX 210.5-02.1)

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Amount of increase (decrease) in cash and cash equivalents. Cash and cash equivalents are the amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Includes effect from exchange rate changes.

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-Topic 830

-SubTopic 230

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-Paragraph 1

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Amount of increase (decrease) from the effect of exchange rate changes on cash and cash equivalent balances held in foreign currencies.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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Note 16 - Condensed Consolidating Financial Information Of Guarantor Subsidiaries (Details) - Condensed Consolidating Cash Flow Information (USD $) In Thousands, unless otherwise specified	3 Months Ended				3 Months Ended							3 Months Ended						3 Months Ended							3 Months Ended			3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012	May 31, 2013	May 31, 2012	Aug. 31, 2013 Immucor Inc [Member]	Aug. 31, 2012 Immucor Inc [Member]	May 31, 2013 Immucor Inc [Member]	Jun. 02, 2013 Immucor Inc [Member] Beginning Balance [Member]	Jun. 02, 2012 Immucor Inc [Member] Beginning Balance [Member]	Aug. 31, 2013 Immucor Inc [Member] Ending Balance [Member]	Aug. 31, 2012 Immucor Inc [Member] Ending Balance [Member]	Aug. 31, 2013 Guarantor [Member]	Aug. 31, 2012 Guarantor [Member]	May 31, 2013 Guarantor [Member]	Jun. 02, 2013 Guarantor [Member] Beginning Balance [Member]	Jun. 02, 2012 Guarantor [Member] Beginning Balance [Member]	Aug. 31, 2013 Guarantor [Member] Ending Balance [Member]	Aug. 31, 2013 Non-Guarantors [Member]	Aug. 31, 2012 Non-Guarantors [Member]	May 31, 2013 Non-Guarantors [Member]	Jun. 02, 2013 Non-Guarantors [Member] Beginning Balance [Member]	Jun. 02, 2012 Non-Guarantors [Member] Beginning Balance [Member]	Aug. 31, 2013 Non-Guarantors [Member] Ending Balance [Member]	Aug. 31, 2012 Non-Guarantors [Member] Ending Balance [Member]	Aug. 31, 2013 Eliminations [Member]	Aug. 31, 2012 Eliminations [Member]	Aug. 31, 2012 Eliminations [Member] Ending Balance [Member]	Aug. 31, 2013 Total [Member]	Aug. 31, 2012 Total [Member]	May 31, 2013 Total [Member]	Jun. 02, 2013 Total [Member] Beginning Balance [Member]	Jun. 02, 2012 Total [Member] Beginning Balance [Member]	Aug. 31, 2013 Total [Member] Ending Balance [Member]	Aug. 31, 2012 Total [Member] Ending Balance [Member]
Note 16 - Condensed Consolidating Financial Information Of Guarantor Subsidiaries (Details) - Condensed Consolidating Cash Flow Information [Line Items]
Net cash provided by (used in) operating activities	$ (4,272)	$ (10,244)			$ (3,578)	$ (16,702)						$ (2,845)	$ 880					$ 3,045	$ 5,501						$ (894)	$ 77		$ (4,272)	$ (10,244)
Net cash provided by ( used in) investing activities	153	(2,167)			6,399	(1,454)						(536)	(736)					(5,710)	23									153	(2,167)
Net cash provided by ( used in) financing activities	(1,673)	11,935			(1,658)	11,935						(15)						(785)							785			(1,673)	11,935
Effect of exchange rate changes on cash and cash equivalents	406	41																297	226						109	(185)		406	41
Increase (decrease) in cash and cash equivalents	(5,386)	(435)			1,163	(6,221)						(3,396)	144					(3,153)	5,750							(108)		(5,386)	(435)
Cash and cash equivalents	$ 24,002	$ 18,143	$ 29,388	$ 18,578	$ 8,134		$ 6,971	$ 6,971	$ 8,093	$ 8,134	$ 1,872	$ 711		$ 4,107	$ 4,107	$ (144)	$ 711	$ 15,157		$ 18,310	$ 18,310	$ 10,629	$ 15,157	$ 16,379			$ (108)	$ 24,002		$ 29,388	$ 29,388	$ 18,578	$ 24,002	$ 18,143