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Note 12 - Capital Stock (Details Textual)			10 Months Ended	12 Months Ended
	Feb. 08, 2018	Feb. 27, 2015 shares	Dec. 31, 2016	Feb. 18, 2016	Jul. 23, 2012 shares	Feb. 27, 2009 USD ($) $ / shares shares
Preferred Stock, Shares Authorized						40,040,000
Preferred Stock, Par or Stated Value Per Share | $ / shares						$ 0.01
Preferred Stock, Dividend Rate, Percentage			9.00%	1.00%
Stock Repurchase Program, Number of Shares Authorized to be Repurchased					850,000
Percent of Oustanding Stock					5.00%
Community First Bancshares Inc [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		13,105,830
Community First Bancshares Inc [Member] | Preferred Stock [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares		30,852
Subsequent Event [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2
Maximum [Member]
Preferred Stock, Liquidation Preference, Value | $						$ 80,000,000

X

- Definition

Percent of outstanding stock.

+ References

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- Definition

Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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- Definition

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- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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- Definition

Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB TOPIC 4.C)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187143-122770

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