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Note 6 - Loans And Related Allowance For Loan Losses (Detail) - Primary Segments of the Loan Portfolio (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Total loans	$ 409,175		$ 401,880
Ending allowance balance attributable to loans:
Total ending allowance balance	7,173		6,819
Commercial and Industrial [Member]
Loans individually evaluated for impairment	4,414		4,492
Loans collectively evaluated for impairment	60,909		54,693
Total loans	65,323		59,185
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	1,096		595
Allowance for loan losses collectively evaluated for impairment	608		701
Total ending allowance balance	1,704	1,626	1,296	918	957	962
Real Estate Construction [Member]
Loans individually evaluated for impairment	4,383		867
Loans collectively evaluated for impairment	16,939		20,678
Total loans	21,322		21,545
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	442		237
Allowance for loan losses collectively evaluated for impairment	3		201
Total ending allowance balance	445	504	438	257	229	188
Residential Real Estate Mortgage [Member]
Loans individually evaluated for impairment	3,734		4,882
Loans collectively evaluated for impairment	201,699		203,257
Total loans	205,433		208,139
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	482		685
Allowance for loan losses collectively evaluated for impairment	2,471		3,046
Total ending allowance balance	2,953	4,109	3,731	4,363	3,791	3,434
Commercial Real Estate Mortgage [Member]
Loans individually evaluated for impairment	7,021		6,491
Loans collectively evaluated for impairment	105,846		102,011
Total loans	112,867		108,502
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	955		185
Allowance for loan losses collectively evaluated for impairment	1,100		1,121
Total ending allowance balance	2,055	1,492	1,306	1,893	1,921	1,543
Consumer Installment [Member]
Loans collectively evaluated for impairment	4,230		4,509
Total loans	4,230		4,509
Ending allowance balance attributable to loans:
Allowance for loan losses collectively evaluated for impairment	16		48
Total ending allowance balance	16	21	48	143	129	94
Total [Member]
Loans individually evaluated for impairment	19,553		16,732
Loans collectively evaluated for impairment	389,622		385,148
Total loans	409,175		401,880
Ending allowance balance attributable to loans:
Allowance for loan losses individually evaluated for impairment	2,975		1,702
Allowance for loan losses collectively evaluated for impairment	4,198		5,117
Total ending allowance balance	$ 7,173	$ 7,752	$ 6,819	$ 7,574	$ 7,027	$ 6,221

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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