Note 4 - Loans - Activity in Accretable Yield on PCI loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Peoples Bank of Virginia [Member]
Beginning balance	$ 3,388	$ 4,392		$ 3,589
Accretion	(1,263)	(1,379)		(1,237)
Reclassifications from nonaccretable difference(1)	8	825	[1]	287	[1]
Other changes, net	457	(450)		1,753
Ending balance	2,590	3,388		4,392
Waccamaw Bank [Member]
Beginning balance	19,465	21,834		26,109
Accretion	(6,269)	(5,664)		(5,380)
Reclassifications from nonaccretable difference(1)	1,770	3,378	[1]	1,620	[1]
Other changes, net	(327)	(83)		(515)
Ending balance	14,639	19,465		21,834
Others [Member]
Beginning balance	22,853	26,226		29,698
Accretion	(7,532)	(7,043)		(6,617)
Reclassifications from nonaccretable difference(1)	1,778	4,203	[1]	1,907	[1]
Other changes, net	130	(533)		1,238
Ending balance	$ 17,229	$ 22,853		$ 26,226

[1] Represents changes attributable to expected loss assumptions