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Note 10 - Income Taxes (Details Textual) - USD ($)	Dec. 31, 2020	Dec. 31, 2019
Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability, Bad Debt Reserve for Tax Purposes of Qualified Lender	$ 14,900,000
Deferred Tax Assets, Net, Total	2,741,000	$ 3,873,000
Tax Credit Carryforwards, Alternative Minimum Tax, Not Subject to Expiration	225,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards, Total	44,700,000
State and Local Jurisdiction [Member] | Illinois Department of Revenue [Member]
Tax Credit Carryforward, Valuation Allowance	200,000	$ 0
Domestic Tax Authority [Member]
Operating Loss Carryforwards, Total	$ 7,200,000

X

- Definition

Represents alternative minimum tax not subject to expiration for tax credit carryforwards.

+ References

No definition available.

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- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
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Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to bad debt reserve for tax purposes of a qualified lender.

+ References

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized.

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