Note 2 - Fair Value of Financial Instruments (Detail) - Level 3 Fair Value Measurements (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Commercial Real Estate Construction Financing Receivable [Member] | Minimum [Member]
Commercial real estate:
Range	15%
Commercial Real Estate Construction Financing Receivable [Member]
Commercial real estate:
Fair Value (in Dollars)	1,562
Valuation Technique(s)	Sales approach
Unobservable Input(s)	Adjustment to comparables
Range	15%
Commercial and Industrial [Member] | Minimum [Member]
Commercial real estate:
Range	15%
Commercial and Industrial [Member]
Commercial real estate:
Fair Value (in Dollars)	1,055
Valuation Technique(s)	Sales approach
Unobservable Input(s)	Adjustment to comparables
Range	15%