Note 3 - Selected Balance Sheet Data - Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Jun. 30, 2020
Property and equipment, cost	$ 385,894	$ 346,650
Accumulated depreciation and amortization	(186,919)	(169,821)
Property and equipment, net	198,975	176,829
Land [Member]
Property and equipment, cost	8,596	8,516
Building and Building Improvements [Member]
Property and equipment, cost	189,443	184,430
Machinery and Equipment [Member]
Property and equipment, cost	$ 187,855	$ 153,704

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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