Note 18 - Parent Company Financial Information (Details) - Condensed Statement of Income (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Condensed Income Statements, Captions [Line Items]
Income before applicable income taxes and equity in undistributed income of subsidiary	$ 3,217,000	$ 2,624,000	$ 2,808,000	$ 2,993,000	$ 2,481,000	$ 2,732,000	$ 2,384,000	$ 3,141,000	$ 11,642,000	$ 10,738,000
Provision for income taxes	731,000	580,000	636,000	697,000	519,000	604,000	490,000	733,000	2,644,000	2,346,000
Net income	2,486,000	2,044,000	2,172,000	2,296,000	1,962,000	2,128,000	1,894,000	2,408,000	8,998,000	8,392,000
Parent Company [Member]
Condensed Income Statements, Captions [Line Items]
Dividends from subsidiary									2,925,000	3,512,000
Interest, dividend and other income									142,000	99,000
Securities gains									1,045,000	629,000
Total income									4,112,000	4,240,000
Expenses									313,000	285,000
Income before applicable income taxes and equity in undistributed income of subsidiary									3,799,000	3,955,000
Provision for income taxes									292,000	151,000
Income before equity in undistributed income of subsidiary									3,507,000	3,804,000
Equity in undistributed income of subsidiary									5,491,000	4,588,000
Net income									$ 8,998,000	$ 8,392,000