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Note 5 - Share Repurchase Program (Details Textual) $ in Thousands		3 Months Ended					9 Months Ended
	Aug. 13, 2020	Mar. 31, 2023 USD ($) shares	Dec. 31, 2022 shares	Sep. 30, 2022 shares	Jun. 30, 2022 USD ($) shares	Mar. 31, 2022 USD ($) shares	Dec. 31, 2022 USD ($)	May 03, 2022 USD ($) shares	Aug. 31, 2020 shares	Aug. 31, 2019 USD ($) shares
Stock Repurchase Program, Authorized Amount | $								$ 50,000		$ 34,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased (in shares) | shares								3,100,000	2,700,000	1,800,000
Stock Repurchased and Retired During Period, Shares (in shares) | shares		0	0	0	963,000	1,307,000
Stock Repurchased and Retired During Period, Value | $					$ 16,800	$ 25,000	$ 16,753
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $		$ 33,200
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased (in shares) | shares		2,200,000
Stock Split To [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	3
Stock Split from [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio	2

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- Definition

Amount of stock repurchase plan authorized.

+ References

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

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Amount remaining of a stock repurchase plan authorized.

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

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Number of shares that have been repurchased and retired during the period.

+ References

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-Section 50
-Paragraph 2
-SubTopic 10
-Topic 505
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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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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.

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