Note 2 - Fair Value of Financial Instruments (Detail) - Level 3 Fair Value Measurements (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Commercial Real Estate Nonowner Occupied [Member] | Minimum [Member] | Capitalization Rate [Member] | Borrower B [Member]
Commercial real estate:
Range	10%
Commercial Real Estate Nonowner Occupied [Member] | Maximum [Member] | Capitalization Rate [Member] | Borrower B [Member]
Commercial real estate:
Range	20%
Commercial Real Estate Nonowner Occupied [Member] | Weighted Average [Member] | Capitalization Rate [Member] | Borrower B [Member]
Commercial real estate:
Range	15%
Commercial Real Estate Nonowner Occupied [Member] | Capitalization Rate [Member] | Borrower B [Member]
Commercial real estate:
Fair Value (in Dollars)	2,380
Valuation Technique(s)	Income approach
Unobservable Input(s)	Capitalization rate
Range	-
Commercial Real Estate Construction Financing Receivable [Member] | Weighted Average [Member]
Commercial real estate:
Range	10%
Commercial Real Estate Construction Financing Receivable [Member]
Commercial real estate:
Fair Value (in Dollars)	395
Valuation Technique(s)	Income approach
Unobservable Input(s)	Capitalization rate
Range	10%