Note 3 - Loans/Leases Receivable (Detail) - Nonperforming Loans/Leases (USD $)	Sep. 30, 2012		Dec. 31, 2011
Nonaccrual loans/leases	$ 17,731,331		$ 18,994,839
Troubled debt restructurings - accruing	11,758,653		20,526,457
Total nonperforming loans/leases	22,893,312		29,859,163
Percentage of total nonperforming loans/leases	100.00%		100.00%
Nonperforming [Member] | Commercial and Industrial [Member]
Total nonperforming loans/leases	1,992,549		3,097,617
Nonperforming [Member] | Owner-occupied commercial real estate [Member]
Total nonperforming loans/leases	671,184		1,011,456
Nonperforming [Member] | Commercial construction, land development, and other land [Member]
Total nonperforming loans/leases	2,448,875		10,020,374
Nonperforming [Member] | Non-owner occupied Commercial Real Estate [Member]
Total nonperforming loans/leases	15,459,160		14,342,900
Nonperforming [Member] | Finance Leases Portfolio Segment [Member]
Total nonperforming loans/leases	1,094,724		1,306,663
Nonperforming [Member] | Residential Portfolio Segment [Member]
Total nonperforming loans/leases	1,517,304		1,133,475
Nonperforming [Member] | Consumer Portfolio Segment [Member]
Total nonperforming loans/leases	759,478		1,097,016
Nonperforming [Member] | Total [Member]
Total nonperforming loans/leases	23,943,274		32,009,501
Commercial and Industrial [Member]
Accruing Past Due 90 Days or More	149,750		120,000
Nonaccrual loans/leases	1,657,986	[1]	2,790,210	[1]
Troubled debt restructurings - accruing	184,813		187,407
Percentage of total nonperforming loans/leases	8.32%		9.68%
Owner-occupied commercial real estate [Member]
Accruing Past Due 90 Days or More	0		0
Nonaccrual loans/leases	671,184	[1]	1,011,456	[1]
Troubled debt restructurings - accruing	0		0
Percentage of total nonperforming loans/leases	2.80%		3.16%
Commercial construction, land development, and other land [Member]
Accruing Past Due 90 Days or More	0		968,919
Nonaccrual loans/leases	2,111,375	[1]	2,975,312	[1]
Troubled debt restructurings - accruing	337,500		6,076,143
Percentage of total nonperforming loans/leases	10.23%		31.30%
Non-owner occupied Commercial Real Estate [Member]
Accruing Past Due 90 Days or More	0		0
Nonaccrual loans/leases	10,155,795	[1]	9,293,105	[1]
Troubled debt restructurings - accruing	5,303,365		5,049,795
Percentage of total nonperforming loans/leases	64.57%		44.81%
Finance Leases Portfolio Segment [Member]
Accruing Past Due 90 Days or More	0		0
Nonaccrual loans/leases	1,094,724	[1]	716,425	[1]
Troubled debt restructurings - accruing	0		590,238
Percentage of total nonperforming loans/leases	4.57%		4.08%
Residential Portfolio Segment [Member]
Accruing Past Due 90 Days or More	0		0
Nonaccrual loans/leases	1,349,565	[1]	1,133,475	[1]
Troubled debt restructurings - accruing	167,739		0
Percentage of total nonperforming loans/leases	6.34%		3.54%
Consumer Portfolio Segment [Member]
Accruing Past Due 90 Days or More	52,733		22,160
Nonaccrual loans/leases	690,702	[1]	1,074,856	[1]
Troubled debt restructurings - accruing	16,043		0
Percentage of total nonperforming loans/leases	3.17%		3.43%
Total [Member]
Accruing Past Due 90 Days or More	202,483		1,111,079
Nonaccrual loans/leases	17,731,331	[1]	18,994,839	[1]
Troubled debt restructurings - accruing	$ 6,009,460		$ 11,903,583
Percentage of total nonperforming loans/leases	100.00%		100.00%

[1] Nonaccrual loans/leases includes $5,749,193 of troubled debt restructurings, including $141,886 in commercial and industrial loans, $5,212,247 in commercial real estate loans, $64,726 in direct financing leases, and $330,334 in installment loans.