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Note 5 - Business Acquisition (Details Textual) - Private Software Company [Member] - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Jun. 30, 2010
Business Combination, Consideration Transferred $ 3.6 $ 1.5
Business Acquisition, Percentage of Voting Interests Acquired 64.00% 36.00%
Payments to Acquire Businesses, Gross $ 1.8  
Business Combination, Consideration Transferred, Liabilities Incurred $ 1.8  
Business Combination, Consideration Transferred, Subsequent Period 3 years  
Business Combination, Consideration Transferred, Liabilities Incurred, Discounted $ 1.6  
Business Combination, Operating Profits, Percentage 30.00%  
Business Combination, Operating Profits, Term 3 years