Note 3 - Investment Securities (Details) - Proceeds Received From Sale of Securities (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Proceeds Received From Sale of Securities [Abstract]
Proceeds from sales of securities	$ 31,225,516	$ 0	$ 37,393,047	$ 19,215,075
Pre-tax gross gains from sales of securities	506,611	0	523,071	104,600
Pre-tax gross losses from sales of securities	$ (89,675)		$ (89,675)