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Note 5 - Accumulated Other Comprehensive Income (Detail) - Changes in Accumulated Other Comprehensive Income (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Balance as of December 31, 2012 $ 5,391 [1]  
Other comprehensive loss before reclassification (1,004) [1]  
Amount reclassified from accumulated other comprehensive income (122) [1]  
Total other comprehensive loss (1,126) [1] (40)
Balance as of March 31, 2013 $ 4,265 [1]  
[1] All amounts are net of tax. Amounts in parentheses indicate debits.