Note 15 - Income Taxes - Schedule of Unrecognized Tax Benefits Roll Forward (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Unrecognized tax benefits - beginning of year	$ 1,381,000	$ 1,381,000
Impact due to expiration of statute of limitations	(1,316)	0
Unrecognized tax benefits - end of year	$ 65,000	$ 1,381,000