Note 4 - Fair Value Disclosure Measurements (Detail) - Estimated Fair Value of the Company’s Financial Instruments (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Financial assets:
Cash and cash equivalents	$ 45,630	$ 45,346	$ 45,609	$ 34,390
Cash and cash equivalents	45,630	45,346
Available for sale	190,687	194,472
Available for sale	190,687	194,472
Net loans	399,322	400,654
Net loans	402,219	390,206
Bank-owned life insurance	8,604	8,536
Federal Home Loan Bank stock	1,627	1,887
Accrued interest receivable	2,692	2,163
Financial liabilities:
Deposits	591,497	593,335
Deposits	594,218	592,704
Short-term borrowings	5,240	6,538
Short-term borrowings	5,240	6,538
Other borrowings	12,779	12,970
Other borrowings	13,092	13,337
Accrued interest payable	468	492
Fair Value, Inputs, Level 1 [Member]
Financial assets:
Cash and cash equivalents	45,630	45,346
Available for sale	5	5
Bank-owned life insurance	8,604	8,536
Federal Home Loan Bank stock	1,627	1,887
Accrued interest receivable	2,692	2,163
Financial liabilities:
Deposits	403,337	396,582
Short-term borrowings	5,240	6,538
Accrued interest payable	468	492
Fair Value, Inputs, Level 2 [Member]
Financial assets:
Available for sale	190,682	194,467
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Net loans	402,219	390,206
Financial liabilities:
Deposits	190,881	196,122
Other borrowings	$ 13,092	$ 13,337

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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