Note 9 - Deferred Financing Costs, Net (Details) - Deferred Financing Costs (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
Feb. 28, 2015	May 31, 2014
Deferred Financing Costs [Abstract]
Balance at beginning of period	$ 33,116us-gaap_DeferredFinanceCostsNet	$ 39,449us-gaap_DeferredFinanceCostsNet
Amortization	(4,998)us-gaap_AmortizationOfFinancingCosts	(6,333)us-gaap_AmortizationOfFinancingCosts
Balance at end of period	$ 28,118us-gaap_DeferredFinanceCostsNet	$ 33,116us-gaap_DeferredFinanceCostsNet

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

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