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Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans (USD $)
9 Months Ended 12 Months Ended
Sep. 30, 2013
Dec. 31, 2012
Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans [Line Items]    
Number Outstanding (in Shares) 2,564,130 1,964,130
Weighted Average Remaining Contractual Life (years) 1 year 324 days 2 years 54 days
Weighted Average Exercise Price $ 2.62 $ 2.70
Number Exercisable (in Shares) 2,042,753  
Weighted Average Exercise Price $ 2.65  
Price Range 1 [Member]
   
Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans [Line Items]    
Range of Exercise Price, Upper $ 1.50  
Number Outstanding (in Shares) 452,500  
Weighted Average Remaining Contractual Life (years) 1 year 146 days  
Weighted Average Exercise Price $ 1.50  
Number Exercisable (in Shares) 452,500  
Weighted Average Exercise Price $ 1.50  
Price Range 2 [Member]
   
Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans [Line Items]    
Range of Exercise Price, Upper $ 2.35  
Number Outstanding (in Shares) 600,000  
Weighted Average Remaining Contractual Life (years) 3 years 6 months  
Weighted Average Exercise Price $ 235  
Number Exercisable (in Shares) 150,000  
Weighted Average Exercise Price $ 235  
Price Range 3 [Member]
   
Note 10 - Stockholders' Equity (Details) - Options outstanding under the Company’s stock option plans [Line Items]    
Range of Exercise Price, Lower $ 3.00  
Range of Exercise Price, Upper $ 3.60  
Number Outstanding (in Shares) 1,511,630  
Weighted Average Remaining Contractual Life (years) 1 year 156 days  
Weighted Average Exercise Price $ 3.06  
Number Exercisable (in Shares) 1,440,253  
Weighted Average Exercise Price $ 3.04