Note 5 - Other Real Estate Owned - Classification of Other Real Estate Owned and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017		Dec. 31, 2016
Other Real Estate Owned	$ 3,414	$ 2,768	$ 3,414	$ 2,768	$ 3,249	[1]	$ 3,794
Provision for unrealized losses		380	158	380
Operating expenses	64	24	205	37
Total Other Real Estate Owned	64	$ 404	363	$ 417
Residential Lots [Member]
Other Real Estate Owned	1,398		1,398		1,745
Residential Development [Member]
Other Real Estate Owned	366		366
Residential Real Estate [Member]
Other Real Estate Owned	1,197		1,197		1,024
Commercial Lots [Member]
Other Real Estate Owned	63		63		90
Commercial Buildings [Member]
Other Real Estate Owned	$ 390		$ 390		$ 390

[1] Derived from consolidated audited financial statements.