Note 28 - Parent Company Financial Statements - Condensed Statements of Cash Flows (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization of debt issuance costs	$ 45	$ 40	$ 4
Provision for depreciation and amortization	2,061	1,908	1,524
Decrease in other assets	863	118	538
(Decrease) increase in other liabilities	(961)	306	(1,219)
Net cash provided by operating activities	13,554	11,884	10,336
Cash flows from investing activities:
Purchase of premises and equipment	(584)	(2,873)	(705)
Net cash (used) by investing activities	(136,484)	31,212	(30,293)
Cash flows from financing activities:
Debt issuance costs paid			(223)
Redemption of preferred stock			(20,000)
Preferred stock extinguishment costs			(33)
Cash dividends paid on preferred stock			(189)
Cash dividends paid on common stock	(1,776)	(1,603)	(1,601)
Proceeds from stock options exercised	245	10	156
Net proceeds from issuance of common stock	26,778
Net cash provided by (used in) financing activities	121,493	(25,881)	12,727
Net increase (decrease) in cash and cash equivalents	(1,437)	17,215	(7,230)
Supplemental disclosures of non cash financing activities:
Stock compensation grants for the 2016 compensation plan	41
Vested and granted restricted stock issued under employee plans		84	36
Parent Company [Member]
Cash flows from operating activities:
Net income	7,344	5,259	8,586
Adjustments to reconcile net income to net cash provided by operating activities:
Compensation associated with stock options			1
Equity in undistributed net income of subsidiaries	(7,340)	(3,066)	(6,564)
Amortization of debt issuance costs	44	40
Provision for depreciation and amortization	6
Decrease in other assets	32	6	371
(Decrease) increase in other liabilities	59	(137)	229
Net cash provided by operating activities	145	2,102	2,623
Cash flows from investing activities:
Purchase of premises and equipment	(82)
Net cash (used) by investing activities	(82)
Cash flows from financing activities:
Advances on term debt			20,000
Repayment of term debt	(1,819)	(1,001)	(83)
Debt issuance costs paid			(223)
Redemption of preferred stock			(20,000)
Preferred stock extinguishment costs			(33)
Cash dividends paid on preferred stock			(189)
Cash dividends paid on common stock	(1,776)	(1,603)	(1,601)
Proceeds from stock options exercised	245	10	156
Net proceeds from issuance of common stock	26,778
Net cash provided by (used in) financing activities	23,428	(2,594)	(1,973)
Net increase (decrease) in cash and cash equivalents	23,491	(492)	650
Cash and cash equivalents at the beginning of year	493	985	335
Cash and cash equivalents at the end of year	23,984	493	985
Supplemental disclosures of non cash financing activities:
Stock compensation grants for the 2016 compensation plan	41
Vested and granted restricted stock issued under employee plans		$ 84	$ 36