Note N - Segment Information (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Number of Reportable Segments	2
Revenue from Contract with Customer, Including Assessed Tax	$ 154,015	$ 170,966
Non-US [Member]
Revenue from Contract with Customer, Including Assessed Tax	44,738	55,711
UNITED STATES
Revenue from Contract with Customer, Including Assessed Tax	$ 109,277	$ 115,255
Products Manufactured by NAIE [Member] | Non-US [Member] | Product Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	79.00%	84.00%
Products Manufactured by NAIE [Member] | UNITED STATES
Revenue from Contract with Customer, Including Assessed Tax	$ 0	$ 0