Note 14 - Financial Instruments With Off-Balance Sheet Risk (Detail) - Contractual Amount of Financial Instruments with Off-Balance Sheet Risk (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Fixed Rate [Member] | Commitments to Extend Credit [Member]
Financial Instruments With Off-Balance Sheet Risk	$ 51,447	$ 34,399
Fixed Rate [Member] | Standby Letters of Credit [Member]
Financial Instruments With Off-Balance Sheet Risk	2,647	2,942
Fixed Rate [Member]
Financial Instruments With Off-Balance Sheet Risk	54,094	37,341
Variable Rate [Member] | Commitments to Extend Credit [Member]
Financial Instruments With Off-Balance Sheet Risk	77,176	83,173
Variable Rate [Member] | Standby Letters of Credit [Member]
Financial Instruments With Off-Balance Sheet Risk	21,740	22,047
Variable Rate [Member]
Financial Instruments With Off-Balance Sheet Risk	98,916	105,220
Commitments to Extend Credit [Member]
Financial Instruments With Off-Balance Sheet Risk	129,000	118,000
Standby Letters of Credit [Member]
Financial Instruments With Off-Balance Sheet Risk	$ 24,400	$ 25,000