Exchange ratio of equity interests issued or issuable to acquire entity.

No definition available.

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- Definition

It represent of business acquired for loans.

+ References

No definition available.

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- Definition

It represents business acquired for deposits.

+ References

No definition available.

+ Details

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- Definition

Represents the ownership percentage in newly issued shares.

+ References

No definition available.

+ Details

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 720
-SubTopic 35
-Section 50
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Balance Type:	debit
Period Type:	duration

- Definition

Amount of assets acquired at the acquisition date.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
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- Definition

Amount of liabilities assumed at the acquisition date.

+ References

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Balance Type:	credit
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- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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Balance Type:	debit
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- Definition

Number of shares of stock issued during the period pursuant to acquisitions.

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- Definition

Value of stock issued pursuant to acquisitions during the period.

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Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual) $ in Thousands				12 Months Ended
	Jul. 01, 2019 USD ($)	Jul. 01, 2018 USD ($) shares	Jul. 01, 2016	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Stock Issued During Period, Value, Acquisitions					$ 15,495
Goodwill, Impairment Loss	$ 0
Advertising Expense				$ 603	$ 569
Grayson Bankshares, Inc [Member]
Business Acquisition, Equity Interest Issued or Issuable, Exchange Ratio			1.76
Grayson Bankshares, Inc [Member] \| Parkway Acquisition Corp. [Member]
Ownership Percentage in Newly Issued Shares			60.00%
Cardinal Bankshares Corporation [Member]
Business Acquisition, Equity Interest Issued or Issuable, Exchange Ratio			1.3
Cardinal Bankshares Corporation [Member] \| Core Deposits [Member]
Finite-Lived Intangible Asset, Useful Life				20 years
Cardinal Bankshares Corporation [Member] \| Parkway Acquisition Corp. [Member]
Ownership Percentage in Newly Issued Shares			40.00%
Great State Bank [Member]
Business Acquisition, Equity Interest Issued or Issuable, Exchange Ratio		1.21
Stock Issued During Period, Shares, Acquisitions \| shares		1,191,899
Stock Issued During Period, Value, Acquisitions		$ 15,500
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total		145,396
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed Loans		95,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total		132,960
Business Combinations, Recognized Identifiable Assets Acquired And Liability Assumed Of Deposits		$ 130,600
Great State Bank [Member] \| Core Deposits [Member]
Finite-Lived Intangible Asset, Useful Life				7 years