Note G - Economic Dependency - Substantial Net Sales to Certain Customers (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Net sales	$ 34,078	$ 25,202	$ 67,228	$ 59,171
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Net sales	21,986	13,846	41,991	36,096
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 1 [Member]
Net sales	10,350	$ 13,846	22,608	23,965
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 2 [Member]
Net sales	6,109		10,155	$ 12,131
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 3 [Member]
Net sales	$ 5,527		$ 9,228