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Note 8 - Common Shares (Details) (USD $)
 0 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Jan. 07, 2013
Mar. 31, 2013
Mar. 16, 2012
Jan. 23, 2012
Jun. 30, 2013
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Disclosure Text Block Supplement [Abstract]                  
Common Stock, Shares Authorized           250,000,000 250,000,000 250,000,000  
Common Stock, Shares, Outstanding 10,056,719     11,511,764   11,080,540 10,907,063 11,080,540  
Stockholders' Equity Note, Stock Split, Conversion Ratio             4    
Stock Repurchased and Retired During Period, Shares 1,028,531 35,769   1,892,559   592,801      
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share) $ 6.00     $ 3.08          
Stock Repurchased and Retired During Period, Value (in Dollars) $ 6,171,656     $ 5,829,082 $ 259,875   $ (6,537,616) $ (9,115,833) $ (18,442)
Stock Repurchased And Retired During Period Transaction Cost (in Dollars) 106,000     64,000          
Proceeds from Lines of Credit (in Dollars) $ 5,200,000     $ 4,000,000          
Stock Repurchase Program, Number of Shares Authorized to be Repurchased   2,500,000 960,000            
Stock Repurchase Program, Period in Force   12 months 12 months