Note C - Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Jun. 30, 2025
Property and equipment, gross	$ 110,042	$ 106,862
Less: accumulated depreciation and amortization	(59,229)	(55,972)
Property and equipment, net	50,813	50,890
Land [Member]
Property and equipment, gross	8,940	8,940
Building and Building Improvements [Member]
Property and equipment, gross	$ 24,681	24,650
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	$ 42,449	41,311
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	$ 7,474	6,936
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	$ 237	237
Depreciable Life In Years (Year)	3 years
Leasehold Improvements [Member]
Property and equipment, gross	$ 26,261	$ 24,788
Leasehold Improvements [Member] | Minimum [Member]
Depreciable Life In Years (Year)	1 year
Leasehold Improvements [Member] | Maximum [Member]
Depreciable Life In Years (Year)	20 years