Note 3 - Components of Assets and Liabilities of Variable Interest Entities (Details) - USD ($) $ in Thousands	Aug. 31, 2016	May 31, 2016	Aug. 31, 2015	May 31, 2015
Sentilus [Member]
Cash and Cash Equivalents, at Carrying Value	$ 1	$ 36
Accounts Payable	553	744
Total current assets	1	36
Accrued expenses and other current liabilities	8	4
Total current liabilities	561	748
Property and equipment, net	697	644
Deferred Income Tax	5,409	6,207
Goodwill	105	105
Other intangible assets, net	18,818	18,820
Business Combination, Contingent Consideration, Liability	7,623	7,433
Non-current Assets	19,620	19,569
Total noncurrent liabilities	13,032	13,640
Total Assets	19,621	19,605
Total Liabilities	13,593	14,388
Cash and Cash Equivalents, at Carrying Value	9,664	10,263	$ 19,027	$ 18,363
Accounts Payable	18,010	22,229
Total current assets	133,175	127,679
Total current liabilities	79,719	75,362
Property and equipment, net	75,872	76,015
Deferred Income Tax	216,001	222,357
Goodwill	856,679	857,023		842,258
Business Combination, Contingent Consideration, Liability	41,333	40,356		$ 18,596
Non-current Assets	75,872	76,015
Total Assets	1,699,290	1,707,633
Total Liabilities	$ 1,363,186	$ 1,363,087