Note 26 - Regulatory Capital Requirements - Capital Amounts and Ratios (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Total (Tier II) capital to risk weighted assets, actual, amount $ 318,191 $ 302,236
Total (Tier II) capital to risk weighted assets, actual, ratio 12.35% 12.61%
Total (Tier II) capital to risk weighted assets, minimum to be well capitalized, amount $ 257,651 $ 239,680
Total (Tier II) capital to risk weighted assets, minimum to be well capitalized, ratio 10.00% 10.00%
Tier I capital to risk weighted assets, actual, amount $ 270,845 $ 256,900
Tier I capital to risk weighted assets, actual, ratio 10.51% 10.72%
Tier I capital to risk weighted assets, minimum to be well capitalized, amount $ 206,121 $ 191,716
Tier I capital to risk weighted assets, minimum to be well capitalized, ratio 8.00% 8.00%
Tier I capital to average assets, actual, amount $ 270,845 $ 256,900
Tier I capital to average assets, actual, ratio 8.73% 9.02%
Tier I capital to average assets, minimum to be well capitalized, amount $ 201,546 $ 185,127
Tier I capital to average assets, minimum to be well capitalized, ratio 6.50% 6.50%
Common equity tier I capital to risk weighted assets, actual, amount $ 270,845 $ 256,900
Common equity tier I capital to risk weighted assets, actual, ratio 10.51% 10.72%
Common equity tier I capital to risk weighted assets, minimum to be well capitalized, amount $ 128,826 $ 119,823
Common equity tier I capital to risk weighted assets, minimum to be well capitalized, ratio 5.00% 5.00%
Subsidiaries [Member]    
Total (Tier II) capital to risk weighted assets, actual, amount $ 287,897 $ 257,716
Total (Tier II) capital to risk weighted assets, actual, ratio 11.19% 10.78%
Total (Tier II) capital to risk weighted assets, minimum to be well capitalized, amount $ 257,179 $ 239,069
Total (Tier II) capital to risk weighted assets, minimum to be well capitalized, ratio 10.00% 10.00%
Tier I capital to risk weighted assets, actual, amount $ 270,083 $ 241,859
Tier I capital to risk weighted assets, actual, ratio 10.50% 10.12%
Tier I capital to risk weighted assets, minimum to be well capitalized, amount $ 205,743 $ 191,193
Tier I capital to risk weighted assets, minimum to be well capitalized, ratio 8.00% 8.00%
Tier I capital to average assets, actual, amount $ 270,083 $ 241,859
Tier I capital to average assets, actual, ratio 8.73% 8.51%
Tier I capital to average assets, minimum to be well capitalized, amount $ 201,189 $ 184,734
Tier I capital to average assets, minimum to be well capitalized, ratio 6.50% 6.50%
Common equity tier I capital to risk weighted assets, actual, amount $ 270,083 $ 241,859
Common equity tier I capital to risk weighted assets, actual, ratio 10.50% 10.12%
Common equity tier I capital to risk weighted assets, minimum to be well capitalized, amount $ 128,589 $ 119,496
Common equity tier I capital to risk weighted assets, minimum to be well capitalized, ratio 5.00% 5.00%