Note Q - Restructuring of Operations and Other Operating Income (Details Textual) $ in Thousands			3 Months Ended	12 Months Ended		61 Months Ended
	May 13, 2019 USD ($) shares	Mar. 04, 2019 USD ($)	Dec. 27, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Mar. 04, 2020 USD ($)	Jul. 02, 2018 USD ($)
Restructuring Charges, Total				$ 5,138	$ 1,179	$ 12,405
Restructuring and Related Cost, Number of Positions Eliminated						207
Payments for Restructuring				5,054	1,269
Veth Propulsion [Member]
Business Combination, Contingent Consideration, Liability, Total								$ 2,921
Stock Issued During Period, Shares, Acquisitions (in shares) | shares	139,347
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	$ 1,991
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 809
Buyer of Mill Log [Member]
Financing Receivable, before Allowance for Credit Loss, Total							$ 2,500
Proceeds from Collection of Notes Receivable				500
Buyer of Mill Log [Member] | Other Current Assets [Member]
Financing Receivable, after Allowance for Credit Loss, Total				1,200		$ 1,200
Buyer of Mill Log [Member] | Other Assets [Member]
Financing Receivable, after Allowance for Credit Loss, Total				800		$ 800
Mill Log Business [Member] | Discontinued Operations, Disposed of by Sale [Member]
Disposal Group, Including Discontinued Operation, Operating Income (Loss)					(1,374)
Disposal Group, Including Discontinued Operation, Inventory		$ 6,298
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Current		592
Disposal Group, Including Discontinued Operation, Consideration		7,658
Proceeds from Sales of Business, Affiliate and Productive Assets		$ 5,158
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax, Total					768
Employee Severance [Member]
Restructuring Charges, Total				1,953	$ 1,179
Contract Termination [Member] | Manufacturing Segment [Member]
Restructuring Charges, Total				$ 3,185
Restructuring Reserve, Settled without Cash			$ 2,185
Payments for Restructuring			$ 1,000