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Note 13 - Subsequent Event (Details) - USD ($)
$ / shares in Units, $ in Thousands
Nov. 02, 2015
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Subsequent Event [Member]        
Note 13 - Subsequent Event (Details) [Line Items]        
Stock Redeemed or Called During Period, Value $ 71,960      
Series B Preferred Stock [Member]        
Note 13 - Subsequent Event (Details) [Line Items]        
Preferred Stock, Liquidation Preference Per Share   $ 1,000 $ 1,000 $ 1,000
Series B Preferred Stock [Member] | Subsequent Event [Member]        
Note 13 - Subsequent Event (Details) [Line Items]        
Stock Redeemed or Called During Period, Shares 56,600      
Preferred Stock, Liquidation Preference Per Share $ 1,000      
Series C Preferred Stock [Member]        
Note 13 - Subsequent Event (Details) [Line Items]        
Preferred Stock, Liquidation Preference Per Share   $ 1,000 $ 1,000 $ 1,000
Series C Preferred Stock [Member] | Subsequent Event [Member]        
Note 13 - Subsequent Event (Details) [Line Items]        
Stock Redeemed or Called During Period, Shares 15,300      
Preferred Stock, Liquidation Preference Per Share $ 1,000