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Note 3 - Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2013
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]
   
March 31,
 2013
   
December 31, 2012
 
   
(in thousands)
 
   
Fair Value (1)
   
Fair Value (1)
 
Interest rate swap contracts
 
$
425
   
$
273
 
Interest rate swaptions
   
(5,431
)
   
(1,426
)
Securities
   
(229
) 
   
-
 
Totals
 
$
(5,235
) 
 
$
(1,153
)