Note 4 - Loans Receivable - Related Party Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Balance at beginning of year	$ 8,920	$ 7,862	$ 8,521
Additions	4,812	1,896
Repayments	(703)	(838)	(659)
Balance at end of year	$ 13,029	$ 8,920	$ 7,862