Note I - Stockholders' Equity - Reconciliation for the Reclassifications Out of Accumulated Other Comprehensive Income (Loss), Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Net loss	$ (29,519)	$ (39,571)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Actuarial losses	(3,246)	(2,982)
Transition asset and prior service benefit	187	195
Total before tax benefit	(3,059)	(2,787)
Tax benefit	729	670
Net loss	$ (2,330)	$ (2,117)