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Note 8 - Stock Option Plan (Details Textual) - USD ($)
1 Months Ended 9 Months Ended
Apr. 30, 2014
Mar. 31, 2016
Dec. 31, 2015
Oct. 31, 2015
Jun. 30, 2016
Employees [Member] | Minimum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         3 years
Employees [Member] | Maximum [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         5 years
Employees [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period         4 years
Stock Options Expiration Period         10 years
Certain Employees [Member] | Minimum [Member]          
Restricted Stock Holding Period 1 year        
Certain Employees [Member] | Maximum [Member]          
Restricted Stock Holding Period 3 years        
Certain Employees [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years        
Restricted Stock Holding Period 2 years        
Stock Issued During Period, Shares, Restricted Stock Award, Gross 23,676        
Fair Value Of Restricted Shares Upon Issuance $ 76,000        
Holding Restriction, Annual Expiration of Restricted Stock 7,892        
Board Of Directors [Member]          
Stock Options Expiration Period         10 years
Stock Issued During Period, Shares, Restricted Stock Award, Gross     3,333 4,465  
Fair Value Of Restricted Shares Upon Issuance     $ 7,500 $ 10,000  
Board of Directors and Officer [Member]          
Restricted Stock Holding Period   1 year      
Stock Issued During Period, Shares, Restricted Stock Award, Gross   62,874      
Fair Value Of Restricted Shares Upon Issuance   $ 105,000      
The 2015 Incentive Stock Plan [Member]          
Common Stock, Capital Shares Reserved for Future Issuance         1,100,415
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant         434,211
Nonqualified Stock Options [Member]          
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, Options, Grants in Period, Gross         50,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized         $ 66,020