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Note 2 - Investments - Net Investment Income (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Debt Securities [Member]        
Investment income $ 551 $ 348 $ 1,614 $ 898
Equity Securities [Member]        
Investment income $ 24 21 69 56
Cash and Cash Equivalents [Member]        
Investment income 3 4 7
Investment income $ 575 372 1,687 961
Investment expenses (70) (51) (227) (138)
Net investment income $ 505 $ 321 $ 1,460 $ 823