Note 4 - Loans Receivable - Related Party Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Balance at beginning of year	$ 13,029	$ 8,920	$ 7,862
Additions	2,064	4,812	1,896
Repayments	(1,500)	(703)	(838)
Balance at end of year	$ 13,593	$ 13,029	$ 8,920