Note 14 - Federal and State Income Taxes - Unrecognized Tax Benefits (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Federal and State Income Taxes
Balance, beginning	$ 1,249,000	$ 1,293,000
Impact of tax positions taken during current year	375,000	287,000
Gross decrease related to tax positions of prior years		(178)
Gross increase related to tax positions of prior years	44
Reduction as a result of a lapse of the applicable statute of limitations	(414,000)	(153,000)
Balance, ending	$ 1,254,000	$ 1,249,000

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
-URI http://asc.fasb.org/extlink&oid=116821951&loc=SL37586934-109318

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-SubTopic 10
-Section 50
-Paragraph 15A
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-URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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