Note 19 - Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Maximum performance guarantee term	1 year
Liability for potential guarantee obligations	$ 0	$ 0
Sale of mortgage loans in the secondary market	3,673	1,295
Loans sold with recourse provisions	24,500	12,400
Loans receivable, held for sale	3,673	1,295
Amount of uninsured cash	34,600	52,600
Standby Letters of Credit [Member]
Other commitment	23,800	$ 20,300
Commitments to Extend Credit [Member]
Other commitment	$ 1,200,000