Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 7

-Footnote 1

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3044-108585

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 8, 9

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6361293&loc=d3e6676-107765

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 7, 26

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash Equivalents

-URI http://asc.fasb.org/extlink&oid=6507016

+ Details

- Definition

The net cash from (used in) all of the entity's operating activities, including those of discontinued operations, of the reporting entity. Operating activities generally involve producing and delivering goods and providing services. Operating activity cash flows include transactions, adjustments, and changes in value that are not defined as investing or financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

+ References+ Details

Note 15 - Condensed Consolidating Financial Information Of Guarantor Subsidiaries (Detail) - Condensed Consolidating Cash Flow Information (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Aug. 19, 2011	Nov. 30, 2011	Nov. 30, 2010	May 31, 2011	May 31, 2010
Net cash provided by (used in) operating activities	$ 25,588	$ 1,883	$ 47,729
Net cash used in investing activities	(2,265)	(1,941,900)	(3,629)
Net cash	66	1,655,165	202
Effect of exchange rate changes on cash and cash equivalents	(3,029)	(1,236)	1,387
Increase (decrease) in cash and cash equivalents	20,360	(286,088)	45,689
Cash and cash equivalents	322,963	36,875	248,338	302,603	202,649
Beginning Balance [Member] \| Immucor Inc [Member] \| Successor [Member]
Cash and cash equivalents		314,304
Beginning Balance [Member] \| Immucor Inc [Member] \| Predecessor [Member]
Cash and cash equivalents				250,386	171,144
Beginning Balance [Member] \| Guarantor [Member] \| Successor [Member]
Cash and cash equivalents		(89)
Beginning Balance [Member] \| Guarantor [Member] \| Predecessor [Member]
Cash and cash equivalents				(80)	(278)
Beginning Balance [Member] \| Non-Guarantors [Member] \| Successor [Member]
Cash and cash equivalents		8,748
Beginning Balance [Member] \| Non-Guarantors [Member] \| Predecessor [Member]
Cash and cash equivalents				52,297	31,783
Beginning Balance [Member] \| Total [Member] \| Successor [Member]
Cash and cash equivalents		322,963
Beginning Balance [Member] \| Total [Member] \| Predecessor [Member]
Cash and cash equivalents				302,603	202,649
Ending Balance [Member] \| Immucor Inc [Member] \| Successor [Member]
Cash and cash equivalents		26,806
Ending Balance [Member] \| Immucor Inc [Member] \| Predecessor [Member]
Cash and cash equivalents	314,304		208,212
Ending Balance [Member] \| Guarantor [Member] \| Successor [Member]
Cash and cash equivalents		(89)
Ending Balance [Member] \| Guarantor [Member] \| Predecessor [Member]
Cash and cash equivalents	(89)		(100)
Ending Balance [Member] \| Non-Guarantors [Member] \| Successor [Member]
Cash and cash equivalents		10,158
Ending Balance [Member] \| Non-Guarantors [Member] \| Predecessor [Member]
Cash and cash equivalents	8,748		40,226
Ending Balance [Member] \| Total [Member] \| Successor [Member]
Cash and cash equivalents		36,875
Ending Balance [Member] \| Total [Member] \| Predecessor [Member]
Cash and cash equivalents	322,963		248,338
Immucor Inc [Member] \| Successor [Member]
Net cash provided by (used in) operating activities		(1,664)
Net cash used in investing activities		(1,941,000)
Net cash		1,655,166
Increase (decrease) in cash and cash equivalents		(287,498)
Cash and cash equivalents		26,806
Immucor Inc [Member] \| Predecessor [Member]
Net cash provided by (used in) operating activities	64,243		39,485
Net cash used in investing activities	(393)		(2,619)
Net cash	68		202
Increase (decrease) in cash and cash equivalents	63,918		37,068
Cash and cash equivalents				250,386
Guarantor [Member] \| Successor [Member]
Net cash provided by (used in) operating activities		199
Net cash used in investing activities		(199)
Guarantor [Member] \| Predecessor [Member]
Net cash provided by (used in) operating activities	144		379
Net cash used in investing activities	(153)		(201)
Increase (decrease) in cash and cash equivalents	(9)		178
Non-Guarantors [Member] \| Successor [Member]
Net cash provided by (used in) operating activities		13,581
Net cash used in investing activities		(701)
Net cash		(10,753)
Effect of exchange rate changes on cash and cash equivalents		(717)
Increase (decrease) in cash and cash equivalents		1,410
Cash and cash equivalents		10,158
Non-Guarantors [Member] \| Predecessor [Member]
Net cash provided by (used in) operating activities	(13,821)		7,262
Net cash used in investing activities	(1,719)		(809)
Net cash	(25,085)
Effect of exchange rate changes on cash and cash equivalents	(2,924)		1,990
Increase (decrease) in cash and cash equivalents	(43,549)		8,443
Cash and cash equivalents				52,297
Corporate Elimination [Member] \| Successor [Member]
Net cash provided by (used in) operating activities		(10,233)
Net cash		10,752
Effect of exchange rate changes on cash and cash equivalents		(519)
Cash and cash equivalents		(89)
Corporate Elimination [Member] \| Predecessor [Member]
Net cash provided by (used in) operating activities	(24,978)		603
Net cash	25,083
Effect of exchange rate changes on cash and cash equivalents	(105)		(603)
Cash and cash equivalents				(80)
Total [Member] \| Successor [Member]
Net cash provided by (used in) operating activities		1,883
Net cash used in investing activities		(1,941,900)
Net cash		1,655,165
Effect of exchange rate changes on cash and cash equivalents		(1,236)
Increase (decrease) in cash and cash equivalents		(286,088)
Cash and cash equivalents		36,875
Total [Member] \| Predecessor [Member]
Net cash provided by (used in) operating activities	25,588		47,729
Net cash used in investing activities	(2,265)		(3,629)
Net cash	66		202
Effect of exchange rate changes on cash and cash equivalents	(3,029)		1,387
Increase (decrease) in cash and cash equivalents	20,360		45,689
Cash and cash equivalents				$ 302,603