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Note 11 - Stock Based Compensation (Detail) (USD $)
1 Months Ended 12 Months Ended
Aug. 31, 2012
May 18, 2012
Dec. 31, 2012
Dec. 31, 2011
Jul. 31, 2012
Mar. 10, 2011
Share-based Compensation Arrangement by Share-based Payment Award Options Term     10 years      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)         25,000 100,000
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Percent     25.00%      
Stock or Unit Option Plan Expense     $ 434,000 $ 418,000    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options     860,000      
Share-based Compensation, Effect on Earnings Per Share     $0.02      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)   40,000 430,000 395,750    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)   $ 1.23 $ 1.12 $ 1.24    
Estimated Stock Compensation Expense   41,400        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years 4 years 4 years      
Restricted Stock or Unit Expense       1,961    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Lower Range Limit (in Dollars per share)     $ 0.40      
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Upper Range Limit (in Dollars per share)     $ 4.65      
ISO Granted to Greater Than 10% Stockholders [Member] | The 2008 Plan [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award Options Term     5 years      
Restriced Stock Award to CEO on Aug 1, 2012 [Member]
           
Restricted Stock or Unit Expense     46,844      
Employees, Officers and Certain Employees of Affiliate [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)     390,000      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price (in Dollars per share)     $ 1.10      
Estimated Stock Compensation Expense     $ 336,700      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     4 years      
The 2008 Plan [Member]
           
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)     5,600,000      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in Shares)     430,000