Note 2 - Accounting Policies (Details Textual) - USD ($)	Jun. 30, 2019	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Loans Receivable Held-for-sale, Amount	$ 4,283,000
Loans Serviced By Entity But Owned By a Third Party	11,000,000
Servicing Asset at Amortized Cost, Ending Balance	156,000	$ 99,000		$ 37,000
Operating Lease, Right-of-Use Asset	3,342,000
Operating Lease, Liability, Total	3,424,000
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset			$ 3,400,000
Operating Lease, Liability, Total			$ 3,400,000
Commercial Real Estate Portfolio Segment [Member]
Loans Receivable Held-for-sale, Amount	3,400,000
Commercial Portfolio Segment [Member]
Loans Receivable Held-for-sale, Amount	$ 920,000