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Note 11 - Mergers and Acquisitions (Details Textual) - USD ($)			3 Months Ended	9 Months Ended
	May 10, 2018	Feb. 06, 2018	Mar. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
Assets, Total			$ 870,417,000		$ 852,080,000
Marketable Securities, Total			29,243,000		30,026,000
Deposits, Total			655,298,000		$ 637,439,000
Prime Bank [Member]
Assets, Total			65,000,000
Marketable Securities, Total			36,000,000
Loans Payable, Total			23,000,000
Deposits, Total			48,000,000
Hana SBL [Member]
SBA 7 (a) Loan Amount Originated		$ 1,000,000,000
Prime Bank [Member]
Business Combination, Acquisition Related Costs			136,000
Prime Bank [Member] | Scenario, Forecast [Member]
Business Combination, Acquisition Related Costs				$ 200,000
Prime Bank [Member] | Subsequent Event [Member]
Payments to Acquire Businesses, Gross	$ 5,900,000
Hana SBL [Member]
Payments to Acquire Businesses, Gross		83,000,000
Business Combination, Acquisition Related Costs			$ 366,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans and Servicing Rights		120,000,000
Business Combination, Servicing Rights Purchased, Loan Amount		370,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total		$ 41,000,000
Hana SBL [Member] | Scenario, Forecast [Member]
Business Combination, Acquisition Related Costs				$ 350,000

X

- Definition

Represents the amount of loans and servicing rights assumed at the acquisition date.

+ References

No definition available.

+ Details

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X

- Definition

Represents the amount of loans on which the servicing right is purchased in the business acquisition transaction.

+ References

No definition available.

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- Definition

Represents the amount of SBA 7 (a) loan amount originated since inception.

+ References

No definition available.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(11))
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X

- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

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-Topic 805
-SubTopic 10
-Section 25
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- Definition

Amount of liabilities assumed at the acquisition date.

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- Definition

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

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X

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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- Definition

Amount of investment in marketable security.

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X

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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