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Note 7 - Stock Options (Detail) (USD $)
3 Months Ended 9 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     4 years  
Share-based Compensation (in Dollars) $ 16,607 $ 21,830 $ 62,884 $ 68,324
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate       0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum       0.86%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum       1.08%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum       36.07%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum       36.63%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term       5 years
Options, Forfeiture Rate       8.00%