Note 11 - Income Taxes - Provision for Income Taxes (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Current	$ 596,000	$ 630,000
Deferred income taxes	83,000	159,000
Provision for income taxes	$ 680,000	$ 789,000

Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration