Note 8 - Employee Benefit Plans (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred Compensation Arrangement with Individual, Employer Contribution	$ 62,000	$ 55,000	$ 49,000
Three Percent of Base Salary [Member]
Defined Benefit Plan, Company Contribution Percentage of a Percentage of Annual Base Salary	100.00%
Two Percent of Base Salary [Member]
Defined Benefit Plan, Company Contribution Percentage of a Percentage of Annual Base Salary	50.00%