Note N - Segment Information (Details Textual) $ in Thousands	12 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Number of Reportable Segments	2
Revenue from Contract with Customer, Including Assessed Tax	$ 170,966	$ 178,520
Non-US [Member]
Revenue from Contract with Customer, Including Assessed Tax	55,711	83,818
UNITED STATES
Revenue from Contract with Customer, Including Assessed Tax	$ 115,255	$ 94,702
Products Manufactured by NAIE [Member] | Non-US [Member] | Product Concentration Risk [Member] | Revenue Benchmark [Member]
Concentration Risk, Percentage	84.00%	77.00%
Products Manufactured by NAIE [Member] | UNITED STATES
Revenue from Contract with Customer, Including Assessed Tax	$ 0