XML 95 R80.htm IDEA: XBRL DOCUMENT
v3.21.1

Note 15 - Commitments and Unfunded Credits (Details Textual) $ in Thousands | Dec. 31, 2020 USD ($)
--- | ---
Amount of Locked Rate Commitments for Mortgage Loans | $ 10,400
Amount of Locked Rate Commitments for Loans Held for Sale | 245
Access Deposit in Other Commercial Banks | $ 41

X
- Definition The amount of access deposit in other commercial banks. + References No definition available. + Details
Name: | fxnc_AccessDepositInOtherCommercialBanks
Namespace Prefix: | fxnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of locked rate commitments for loans held for sale. + References No definition available. + Details
Name: | fxnc_AmountOfLockedRateCommitmentsForLoansHeldForSale
Namespace Prefix: | fxnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of locked rate commitments for mortgage loans. + References No definition available. + Details
Name: | fxnc_AmountOfLockedRateCommitmentsForMortgageLoans
Namespace Prefix: | fxnc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant