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Note 14 - Income Taxes (Details Textual) - USD ($)		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent		21.00%	21.00%	35.00%
Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect	$ 325,000
Unrecognized Tax Benefits, Ending Balance		$ 0

X

- Definition

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

+ References

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X

- Definition

Amount of increase (decrease) in accumulated other comprehensive income (AOCI) for reclassification to retained earnings of tax effect from remeasurement of deferred tax pursuant to Tax Cuts and Jobs Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 220
-SubTopic 10
-Section 45
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- Definition

Amount of unrecognized tax benefits.

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