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Note 8 - Purchase of Equity Securities (Details Textual) - USD ($)
Dec. 27, 2006
Aug. 04, 2016
Restricted Stock [Member] | Minimum [Member] | Pro Forma [Member]    
Recipients' Share of Taxes, Share-based Compensation $ 400,000  
Restricted Stock [Member] | Maximum [Member] | Pro Forma [Member]    
Recipients' Share of Taxes, Share-based Compensation $ 500,000  
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 562,818  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 10 years  
Assumed Common Stock Price on the Day of Vesting $ 2  
Maximum [Member]    
Stock Repurchase Program, Authorized Amount   $ 1,000,000