Note 10 - Other Borrowings and Unused Lines of Credit (Tables)

12 Months Ended

Dec. 31, 2015

Note 10 - Other Borrowings and Unused Lines of Credit (Tables) [Line Items]

Schedule of Debt [Table Text Block]

	2015		2014
Wholesale structured repurchase agreements	$	110,000,000	$	130,000,000
Term note		-		17,625,000
Series A subordinated notes		-		2,657,492
	$	110,000,000	$	150,282,492

Schedule of Wholesale Repurchase Agreements [Table Text Block]

	December 31, 2015				December 31, 2014
	Amount Due		Weighted Average Interest Rate at Year-End		Amount Due		Weighted Average Interest Rate at Year-End
Maturity:
Year ending December 31:
2015	$	-	0.00	%	$	5,000,000	2.77	%
2016		-	-			-	-
2017		10,000,000	3.00			10,000,000	3.00
2018		10,000,000	3.97			10,000,000	3.97
2019		45,000,000	3.40			60,000,000	3.57
2020		45,000,000	2.66			45,000,000	2.66
Total Wholesale Structured Repurchase Agreements	$	110,000,000	3.11	%	$	130,000,000	3.21	%

Schedule of Line of Credit Facilities [Table Text Block]

	2015		2014
Secured	$	14,601,432	$	17,050,159
Unsecured		332,000,000		329,500,000
	$	346,601,432	$	346,550,159

Wholesale Repurchase Agreements [Member]

Note 10 - Other Borrowings and Unused Lines of Credit (Tables) [Line Items]

Schedule of Underlying Assets of Repurchase Agreements when Amount of Repurchase Agreements Exceeds 10 Percent of Assets [Table Text Block]

	2015		2014
U.S. govt. sponsored agency securities	$	129,824,128	$	153,757,514
Less: overcollateralized position		19,824,128		23,757,514
	$	110,000,000	$	130,000,000