Note 4 - Loans - PCI loans (Details) - Financial Asset Acquired with Credit Deterioration [Member] - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
PCI loans, recorded investment	$ 12,003	$ 18,440
PCI loans, unpaid principal balance	27,768	40,458
Peoples Bank of Virginia [Member]
PCI loans, recorded investment	5,330	5,278
PCI loans, unpaid principal balance	7,272	8,111
Waccamaw Bank [Member]
PCI loans, recorded investment	5,805	12,176
PCI loans, unpaid principal balance	19,602	31,335
Other Receivables [Member]
PCI loans, recorded investment	868	986
PCI loans, unpaid principal balance	$ 894	$ 1,012

The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 15
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant