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Note 6 - Changes in Accumulated Other Comprehensive Income by Component (Details) - Changes in the Balances of Each Component of Accumulated Other Comprehensive Income, Net of Tax (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Mar. 31, 2014
Unrealized Gains And Losses Available For Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]      
Beginning Balance $ 27 $ 117 $ 117 [1]
Other comprehensive income before reclassification     (76) [1]
Amounts reclassified from accumulated other comprehensive income     (14) [1]
Net current-period other comprehensive income     (90) [1]
Ending Balance $ 27 $ 117 $ 27 [1]
[1] Amounts in parentheses represent reductions to accumulated other comprehensive income.