Note B - Acquisitions (Details Textual) - USD ($)			3 Months Ended	5 Months Ended	12 Months Ended
	Feb. 14, 2025	May 31, 2024	Mar. 28, 2025	Jun. 30, 2025	Jun. 30, 2025	Jun. 30, 2024	Dec. 27, 2024
Goodwill				$ 2,892,000	$ 2,892,000	$ 0
Business Combination, Bargain Purchase, Gain Recognized, Amount					0	3,724,000
Kobelt Manufacturing Co. [Member]
Business Combination, Voting Equity Interest Acquired, Percentage	100.00%
Payments to Acquire Businesses, Net of Adjustments	$ 17,236,000
Payments of Net Working Capital Adjustment	516,000
Business Combination, Consideration Transferred, Liabilities Incurred	374,000
Business Combination, Acquiree's Revenue since Acquisition Date, Actual				4,870,000
Business Combination, Acquiree's Earnings (Loss) since Acquisition Date, Actual				(164,000)
Business Combination, Acquisition-Related Cost, Expense			$ 700,000
Goodwill	2,806,000			$ 2,806,000	2,806,000
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill	17,476,000
Business Combination, Consideration Transferred	17,476,000
Kobelt Manufacturing Co. [Member] | BMO [Member] | The New Agreement [Member] | Revolving Credit Facility [Member]
Business Combination, Consideration Transferred, Liabilities Incurred	$ 6,500,000
Katsa Oy [Member]
Business Combination, Voting Equity Interest Acquired, Percentage		100.00%
Payments to Acquire Businesses, Net of Adjustments		$ 25,522,000
Business Combination, Acquisition-Related Cost, Expense		745,000
Business Combination, Transaction Cost, Excluding Separately Recognized Transaction		377,000					$ 600,000
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill		29,608,000
Business Combination, Consideration Transferred		25,884,000
Business Combination, Bargain Purchase, Gain Recognized, Amount		3,724,000			$ (0)	$ 3,724,000
Business Combination, Income Tax Incurred		2,435,000
Katsa Oy [Member] | BMO [Member] | The Tenth Amendment [Member] | Revolving Credit Facility [Member]
Business Combination, Consideration Transferred, Liabilities Incurred		$ 16,900