Note 10 - Fair Value Measurements (Detail) - Carrying Amount and Approximate Fair Value of Financial Instruments (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Cash and due from banks	$ 9,812	$ 12,529
Cash and due from banks	9,812	12,592
Federal funds sold	196	10,363
Securities available-for-sale	63,466	69,207
Securities available-for-sale	63,466	69,207
Restricted equity securities	2,591	2,390
Loans, net	271,147	245,100
Loans, net	272,981	246,601
Accrued income	1,590	1,372
Derivative assets	67	170
Derivative assets	67	170
Total deposits	309,997	307,636
Total deposits	310,453	308,105
Short term borrowings	216	449
Short term borrowings	216	449
FHLB borrowings	22,000	19,000
FHLB borrowings	22,862	19,760
Accrued interest payable	332	435
Accrued interest payable	332	435
Derivative liabilities	67	170
Derivative liabilities	67	170
Fair Value, Inputs, Level 1 [Member]
Cash and due from banks	9,812
Federal funds sold	196
Total deposits	175,325
Short term borrowings	216
Fair Value, Inputs, Level 2 [Member]
Securities available-for-sale	63,466
Restricted equity securities	2,591
Accrued income	1,590
Derivative assets	67	170
Total deposits	135,128
FHLB borrowings	22,862
Accrued interest payable	332
Derivative liabilities	67
Fair Value, Inputs, Level 3 [Member]
Loans, net	$ 272,981