Note G - Economic Dependency - Substantial Net Sales to Certain Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Net sales	$ 25,202	$ 42,295	$ 59,171	$ 85,422
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Net sales	13,846	34,597	36,096	71,083
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 1 [Member]
Net sales	$ 13,846	14,112	23,965	29,265
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 2 [Member]
Net sales		15,982	$ 12,131	30,987
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 3 [Member]
Net sales		$ 4,503		$ 10,831