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Note 13 - Income Taxes (Details Textual) - USD ($)
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Reclassification from Deferred Tax Assets to Other Deferred Income Tax Liability [Member] | December 31, 2014 [Member]        
Prior Period Reclassification Adjustment $ 18,400,000      
Unrecognized Tax Benefits, Income Tax Penalties Accrued 0 $ 0    
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 39,000,000 39,000,000    
Deferred Tax Assets, Valuation Allowance 452,000 452,000 $ 409,000  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount   43,000    
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 2,300,000 2,300,000 2,100,000  
Unrecognized Tax Benefits, Interest on Income Taxes Accrued $ 11,600 11,600 17,500 $ 32,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense   $ 110,100 $ 98,500 $ 81,000