Note 10 - Long-term Debt (Details) - Long-term Debt (Parentheticals) - USD ($) $ in Thousands	Aug. 31, 2015	May. 31, 2015
Notes Payable, Other Payables [Member]
Note 10 - Long-term Debt (Details) - Long-term Debt (Parentheticals) [Line Items]
Debt discounts	$ 3,136	$ 3,291
Term Loan Facility [Member]
Note 10 - Long-term Debt (Details) - Long-term Debt (Parentheticals) [Line Items]
Debt discounts	$ 6,848	$ 7,381

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=34725769&loc=d3e28878-108400

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