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Note 8 - Acquired Intangible Assets, Net (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Disclosure Text Block [Abstract]      
Amortization of Intangible Assets $ 2,092,803us-gaap_AmortizationOfIntangibleAssets $ 2,093,746us-gaap_AmortizationOfIntangibleAssets $ 2,028,498us-gaap_AmortizationOfIntangibleAssets
Finite-Lived Intangible Assets, Amortization Expense, Year Four 1,000,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour    
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 1,000,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths    
Finite-Lived Intangible Assets, Amortization Expense, Year Two 1,000,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo    
Finite-Lived Intangible Assets, Amortization Expense, Year Five 1,000,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive    
Finite-Lived Intangible Assets, Amortization Expense, Year Three 1,000,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree    
Finite-Lived Intangible Assets, Amortization Expense, after Year Five $ 5,200,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive