Note 8 - Business Combinations (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended	0 Months Ended	3 Months Ended		0 Months Ended	3 Months Ended
	Sep. 02, 2013 Data Content [Member] Revere Data, LLC [Member]	May 31, 2014 Data Content [Member] Matrix Data Limited [Member]	Sep. 02, 2013 Customer Relationships [Member] Revere Data, LLC [Member]	May 31, 2014 Customer Relationships [Member] Matrix Data Limited [Member]	Sep. 02, 2013 Noncompete Agreements [Member] Revere Data, LLC [Member]	May 31, 2014 Noncompete Agreements [Member] Matrix Data Limited [Member]	Sep. 02, 2013 Trade Names [Member] Revere Data, LLC [Member]	May 31, 2014 Trade Names [Member] Matrix Data Limited [Member]	May 31, 2014 Software Technology [Member] Matrix Data Limited [Member]	Sep. 02, 2013 Revere Data, LLC [Member]	Nov. 30, 2013 Revere Data, LLC [Member]	May 31, 2014 Matrix Data Limited [Member]	Feb. 28, 2014 Matrix Data Limited [Member]
Note 8 - Business Combinations (Details) [Line Items]
Business Combination, Consideration Transferred (in Dollars)										$ 15.3		$ 31.8
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period (in Dollars)										4.9
Finite-lived Intangible Assets Acquired (in Dollars)										4.1	4.1	8.7	8.7
Finite-Lived Intangible Asset, Useful Life	5 years	4 years	7 years	8 years	2 years	3 years	4 years	4 years	5 years
Business Acquisition, Purchase Price Allocation, Goodwill Amount (in Dollars)										11.6		25.5
Subscription and Circulation Revenue (in Dollars)												$ 7.3