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Note 8 - Subsequent Events (Details Textual) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
	Apr. 21, 2022	Mar. 31, 2022	Dec. 31, 2021
Federal Fund Rate, Increase Rate		0.25%
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment and Tax		$ 42.8	$ 3.3
Interest Rate Cap [Member] | Subsequent Event [Member]
Derivative, Notional Amount	$ 200.0
Derivative, Term of Contract (Year)	8 years
Interest Rate Cap [Member] | Subsequent Event [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Derivative, Cap Interest Strike Price	2.68%
Pay-fixed Interest Rate Swap [Member] | Subsequent Event [Member]
Derivative, Notional Amount	$ 200.0
Derivative, Term of Contract (Year)	8 years
Pay-fixed Interest Rate Swap [Member] | Subsequent Event [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]
Derivative, Forward Swap, Coupon Rate	2.75%
Receive-fixed Interest Rate Swap [Member] | Subsequent Event [Member]
Derivative, Notional Amount	$ 200.0
Derivative, Forward Swap, Coupon Rate	2.41%

X

- Definition

The strike price on cap derivatives.

+ References

No definition available.

+ Details

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X

- Definition

Coupon rate of forward swap contract.

+ References

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- Definition

Increase of federal fund rate.

+ References

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X

- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5580258-113959

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5579245-113959

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X

- Definition

Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 9
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27357-111563

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