Note G - Economic Dependency - Substantial Net Sales to Certain Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Net sales	$ 42,295	$ 37,727	$ 85,422	$ 76,067
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Net sales	34,597	26,334	71,083	51,373
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 1 [Member]
Net sales	15,982	4,773	30,987	9,121
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 2 [Member]
Net sales	14,112	12,966	29,265	26,264
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 3 [Member]
Net sales	$ 4,503	$ 8,595	$ 10,831	$ 15,988