Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.15(5))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph a

-Article 7

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 15

-Subparagraph 5

-Article 9

Name:	us-gaap_DividendsPayableCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Supplemental Cash Flow Information (Details Textual) (USD $) In Thousands, unless otherwise specified				6 Months Ended	12 Months Ended	6 Months Ended	12 Months Ended
	Nov. 30, 2012	Nov. 29, 2012	Nov. 30, 2011	Nov. 30, 2012 Rental and lease equipment [Member]	May 31, 2012 Rental and lease equipment [Member]	Nov. 30, 2012 Demonstration Equipment [Member]	May 31, 2012 Demonstration Equipment [Member]
Supplemental Cash Flow Information (Textual) [Abstract]
Accounts payable related to acquired rental and lease equipment				$ 3,672	$ 5,513
Transferred demonstration equipment to rental and lease equipment during the period						1,001	460
Supplemental Cash Flow Information (Additional Textual) [Abstract]
Accrued Dividend	$ 29,186	$ 29,186	$ 0