Note 9 - Long-Term Debt (Details) - Long Term Debt (Parentheticals) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	May 31, 2013
Note 9 - Long-Term Debt (Details) - Long Term Debt (Parentheticals) [Line Items]
Debt Discounts	$ 10,904	$ 11,384
Notes [Member]
Note 9 - Long-Term Debt (Details) - Long Term Debt (Parentheticals) [Line Items]
Debt Discounts	$ 4,248	$ 4,370

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentUnamortizedDiscount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant