Note 8 - Fair Value of Assets and Liabilities (Details) - The Carrying Values and Estimated Fair Values of Financial Instruments (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Financial assets:
Cash and short-term investments	$ 182,354	$ 148,139
Cash and short-term investments, fair value	182,354	148,139
Securities available for sale	217,308	218,110
Restricted stocks	3,690	4,336
Restricted stocks	3,690	4,336
Loans, net	791,170	785,532
Loans, net, fair value	806,770	800,488
Loans held for sale, net	33,603	35,879
Loans held for sale, net	33,603	35,879
Accrued interest receivable	6,255	6,360
Accrued interest receivable, fair value	6,255	6,360
BOLI	14,176	13,988
Derivative asset	950	533
Derivative asset, fair value	950	533
BOLI, fair value	14,176	13,988
Derivative asset	950	533
Derivative asset, fair value	950	533
Financial liabilities:
Time deposits	379,788	399,883
Time deposits, fair value	382,934	403,291
Borrowings	169,608	169,835
Borrowings, fair value	162,368	162,194
Derivative liability	245	331
Derivative liability, fair value	245	331
Accrued interest payable	807	843
Accrued interest payable, fair value	807	843
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and short-term investments, fair value	182,354	148,139
Restricted stocks	3,690	4,336
Accrued interest receivable, fair value	6,255	6,360
Financial liabilities:
Accrued interest payable, fair value	807	843
Fair Value, Inputs, Level 1 [Member] | Demand Deposits [Member]
Financial liabilities:
Demand deposits, fair value	659,964	608,409
Fair Value, Inputs, Level 2 [Member]
Financial assets:
Securities available for sale	217,308	218,110
Loans held for sale, net	33,603	35,879
BOLI	14,176	13,988
Derivative asset	950	533
Derivative asset, fair value	950	533
BOLI, fair value	14,176	13,988
Derivative asset	950	533
Derivative asset, fair value	950	533
Financial liabilities:
Time deposits, fair value	382,934	403,291
Borrowings, fair value	162,368	162,194
Derivative liability, fair value	245	331
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Loans, net, fair value	806,770	800,488
Demand Deposits [Member]
Financial liabilities:
Demand deposits	659,964	608,409
Demand deposits, fair value	$ 659,964	$ 608,409