Note 13 - Income Taxes (Details Textual) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%	35.00%	35.00%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability			$ 2,400,000
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves				$ 4,200,000
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Bad Debt Reserve for Tax Purposes of Qualified Lender			1,100,000	1,600,000
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount				897,000	$ 120,000
Unrecognized Tax Benefits, Income Tax Penalties Expense			66,000	0	$ 0
NUBILs [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ (900,000)
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards			5,400,000
Operating Loss Carryforwards, Annual Limit, Maximum			405,000
State and Local Jurisdiction [Member] | Arkansas Department of Finance and Administration [Member]
Operating Loss Carryforwards			0
Other Liabilities [Member]
Taxes Payable			$ 2,500,000	$ 11,000
Scenario, Forecast [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%