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Note 11 - Stock Repurchase Program (Details) (USD $)
 0 Months Ended
Aug. 11, 2014
May 07, 2015
Note 11 - Stock Repurchase Program (Details) [Line Items]    
Stock Repurchased During Period, Shares (in Shares) 125,000us-gaap_StockRepurchasedDuringPeriodShares  
Stock Repurchased During Period, Value $ 6,995,000us-gaap_StockRepurchasedDuringPeriodValue  
Subsequent Event [Member] | Common Stock [Member]    
Note 11 - Stock Repurchase Program (Details) [Line Items]    
Stock Repurchase Program, Authorized Amount   25,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_CommonStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Subsequent Event [Member] | Preferred Stock [Member]    
Note 11 - Stock Repurchase Program (Details) [Line Items]    
Stock Repurchase Program, Authorized Amount   $ 25,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_PreferredStockMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember