Note 1 - Summary of Significant Interim Accounting Policies (Detail) - Earnings Per Share Data (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net earnings used in the computation of basic and diluted earnings per share (in Dollars)	$ 1,242,000	$ 1,880,000	$ 2,546,000	$ 3,411,000
Weighted average shares outstanding - basic	6,063,269	5,986,676	6,051,795	5,986,884
Common stock equivalents	84,743	92,754	92,076	93,956
Weighted average shares outstanding - diluted	6,148,012	6,079,430	6,143,871	6,080,840
Basic
Net earnings (in Dollars per share)	$ 0.20	$ 0.31	$ 0.42	$ 0.57
Diluted
Net earnings (in Dollars per share)	$ 0.20	$ 0.31	$ 0.41	$ 0.56