Note 18 - Subsequent Event (Details Textual) - USD ($) $ in Thousands	3 Months Ended
Feb. 29, 2016	Nov. 30, 2015	Nov. 30, 2014
Scenario, Forecast [Member] \| Minimum [Member] \| Research Tax Credit Carryforward [Member]
Income Tax Expense (Benefit)	$ (7,000)
Scenario, Forecast [Member] \| Maximum [Member] \| Research Tax Credit Carryforward [Member]
Income Tax Expense (Benefit)	$ (7,500)
Income Tax Expense (Benefit)		$ 27,436	$ 24,830

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (a),(b)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Income Tax Expense (or Benefit)
-URI http://asc.fasb.org/extlink&oid=6515339

Name:	us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration