Note C - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023
Property and equipment, gross	$ 105,780	$ 104,502
Less: accumulated depreciation and amortization	(51,809)	(50,661)
Property and equipment, net	53,971	53,841
Land [Member]
Property and equipment, gross	8,941	8,940
Building and Building Improvements [Member]
Property and equipment, gross	$ 24,723	24,712
Building and Building Improvements [Member] | Minimum [Member]
Depreciable Life In Years (Year)	7 years
Building and Building Improvements [Member] | Maximum [Member]
Depreciable Life In Years (Year)	39 years
Machinery and Equipment [Member]
Property and equipment, gross	$ 42,253	41,460
Machinery and Equipment [Member] | Minimum [Member]
Depreciable Life In Years (Year)	3 years
Machinery and Equipment [Member] | Maximum [Member]
Depreciable Life In Years (Year)	12 years
Office Equipment [Member]
Property and equipment, gross	$ 6,605	6,522
Office Equipment [Member] | Minimum [Member]
Depreciable Life In Years (Year)	3 years
Office Equipment [Member] | Maximum [Member]
Depreciable Life In Years (Year)	5 years
Vehicles [Member]
Property and equipment, gross	$ 227	227
Depreciable Life In Years (Year)	3 years
Leasehold Improvements [Member]
Property and equipment, gross	$ 23,031	$ 22,641
Leasehold Improvements [Member] | Minimum [Member]
Depreciable Life In Years (Year)	1 year
Leasehold Improvements [Member] | Maximum [Member]
Depreciable Life In Years (Year)	15 years