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Note P - Income Taxes (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Effective Income Tax Rate Reconciliation, Percent, Total		27.56%
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability		$ 3,786
Transitional Income Tax , Amount	$ 0
Undistributed Earnings of Foreign Subsidiaries	6,208
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	938
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 148	$ 93
Foreign Tax Authority [Member]
Open Tax Year	2015 2016 2017 2018 2019
Domestic Tax Authority [Member]
Open Tax Year	2015 2016 2017 2018 2019
State and Local Jurisdiction [Member] | Wisconsin Department of Revenue [Member]
Open Tax Year	2010 2011 2012 2013

X

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Amount of the income tax calculated by the sum of the amount of post-1986 earnings and profits for all foreign subsidiaries as well as the amount of non-U.S. income taxes paid on such earnings.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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