Note 4 - Loans Receivable - Related Party Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Balance at beginning of year	$ 13,593	$ 13,029	$ 8,920
Additions	2,838	2,064	4,812
Repayments	(1,491)	(1,500)	(703)
Balance at end of year	$ 14,940	$ 13,593	$ 13,029