Note 12 - Share-based Compensation (Details) - Summary of compensation expense for all share-based compensation (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013
Note 12 - Share-based Compensation (Details) - Summary of compensation expense for all share-based compensation [Line Items]
2014	$ 4,085
2015	2,745
2016	1,434
2017	482
2018	75
Total	8,821
Share Based Awards [Member]
Note 12 - Share-based Compensation (Details) - Summary of compensation expense for all share-based compensation [Line Items]
2014	1,360
2015	1,048
2016	754
2017	482
2018	75
Total	3,719
Restricted Stock [Member]
Note 12 - Share-based Compensation (Details) - Summary of compensation expense for all share-based compensation [Line Items]
2014	2,725
2015	1,697
2016	680
Total	$ 5,102