Note 10 - Derivative Financial Instruments - Fair Value of Swaps Recognized in Accrued Liabilities and in Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
Sep. 30, 2022	Jun. 30, 2022
Notional Amount
Fixed Rate
Fair Value, Liability	$ 12,191	$ 8,420
Interest Rate Swap Effective August 6, 2018 [Member]
Notional Amount	$ 25,000
Fixed Rate	2.83%
Maturity	Aug. 06, 2023
Fair Value, Liability	$ 310	48
Interest Rate Swap Effective March 23, 2020 [Member]
Notional Amount	$ 100,000
Fixed Rate	0.91%
Maturity	Mar. 23, 2025
Fair Value, Liability	$ 7,891	5,538
Interest Rate Swap Effective April 24, 2020 [Member]
Notional Amount	$ 25,000
Fixed Rate	0.88%
Maturity	Apr. 24, 2025
Fair Value, Liability	$ 2,019	1,447
Interest Rate Swap Effective May 24, 2020 [Member]
Notional Amount	$ 25,000
Fixed Rate	0.91%
Maturity	Mar. 24, 2025
Fair Value, Liability	$ 1,971	$ 1,387

Fair value of liability associated with financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=99393222&loc=SL20226003-175313

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant