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Note 2 - Securities (Details Textual) $ in Thousands		3 Months Ended		12 Months Ended
	Jan. 01, 2019 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Weighted Average Re-pricing Term (Year)		3 years 36 days		3 years 255 days
Debt Securities, Held-to-maturity, Fair Value, Total		$ 17,626		$ 17,646
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax			$ (431)
Impairment Losses Related to Federal Home Loan Stock		0
Other Assets [Member]
Equity Securities without Readily Determinable Fair Value, Amount		$ 542		$ 514
Accounting Standards Update 2017-12 [Member]
Debt Securities, Held-to-maturity, Fair Value, Total	$ (23,000)
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, before Tax	$ 431
US Agency and Mortgage-backed Securities [Member]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Total		7		42
Available-for-Sale Securities, Number of Securities		98		94
Debt Securities, Held-to-maturity, Fair Value, Total		$ 12,307		$ 12,454
Municipal Bonds [Member]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Total		1		3
Available-for-Sale Securities, Number of Securities		79		79
Debt Securities, Held-to-maturity, Fair Value, Total		$ 3,665		$ 3,680

X

- Definition

The number of investment positions in available-for-sale investments.

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The weighted average period of time between re-pricing of the portfolio.

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Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (b)(3)
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Amount of investment in equity security without readily determinable fair value.

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-Publisher FASB
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Fair value of investment in debt security measured at amortized cost (held-to-maturity).

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-SubTopic 210
-Section S99
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Amount, before tax and adjustment, of unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Name Accounting Standards Codification
-Topic 220
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e637-108580

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