Note 8 - Related Party Transactions - Related Party Loans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Balance, beginning of period	$ 77,897	$ 64,634
Additions, new loans and advances	17,553	17,089
Repayments	(12,632)	(9,573)
Balance, end of period	$ 82,818	$ 72,150