Note G - Economic Dependency - Substantial Net Sales to Certain Customers (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Net sales	$ 43,127	$ 38,340
Customer Concentration Risk [Member] | Revenue Benchmark [Member]
Net sales	36,485	29,358
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 1 [Member]
Net sales	15,152	13,296
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 2 [Member]
Net sales	15,005	4,349
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 3 [Member]
Net sales	$ 6,328	7,386
Customer Concentration Risk [Member] | Revenue Benchmark [Member] | Customer 4 [Member]
Net sales		$ 4,327