Note 11 - Income Taxes - Income Tax Reconciliation (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income taxes based on U.S. statutory rate of 21% and 34%, respectively	$ 6,772,000	$ 773,000
Non-deductible meals and entertainment	5,000	8,000
FDII deduction	(348,000)	(6,000)
Foreign taxes	(38,000)	(75,000)
State taxes	603,000	85,000
Other	(1,832,000)	(105,000)
Provision for income taxes	$ 5,162,000	$ 680,000